Add todo with interceptor

schema/ent/example/ent/client.go

@@ -11,11 +11,14 @@ import (
 
 	"ersteller-lib/schema/ent/example/ent/migrate"
 
+	"ersteller-lib/schema/ent/example/ent/group"
+	"ersteller-lib/schema/ent/example/ent/todo"
 	"ersteller-lib/schema/ent/example/ent/user"
 
 	"entgo.io/ent"
 	"entgo.io/ent/dialect"
 	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
 )
 
 // Client is the client that holds all ent builders.
@@ -23,6 +26,10 @@ type Client struct {
 	config
 	// Schema is the client for creating, migrating and dropping schema.
 	Schema *migrate.Schema
+	// Group is the client for interacting with the Group builders.
+	Group *GroupClient
+	// Todo is the client for interacting with the Todo builders.
+	Todo *TodoClient
 	// User is the client for interacting with the User builders.
 	User *UserClient
 }
@@ -36,6 +43,8 @@ func NewClient(opts ...Option) *Client {
 
 func (c *Client) init() {
 	c.Schema = migrate.NewSchema(c.driver)
+	c.Group = NewGroupClient(c.config)
+	c.Todo = NewTodoClient(c.config)
 	c.User = NewUserClient(c.config)
 }
 
@@ -129,6 +138,8 @@ func (c *Client) Tx(ctx context.Context) (*Tx, error) {
 	return &Tx{
 		ctx:    ctx,
 		config: cfg,
+		Group:  NewGroupClient(cfg),
+		Todo:   NewTodoClient(cfg),
 		User:   NewUserClient(cfg),
 	}, nil
 }
@@ -149,6 +160,8 @@ func (c *Client) BeginTx(ctx context.Context, opts *sql.TxOptions) (*Tx, error)
 	return &Tx{
 		ctx:    ctx,
 		config: cfg,
+		Group:  NewGroupClient(cfg),
+		Todo:   NewTodoClient(cfg),
 		User:   NewUserClient(cfg),
 	}, nil
 }
@@ -156,7 +169,7 @@ func (c *Client) BeginTx(ctx context.Context, opts *sql.TxOptions) (*Tx, error)
 // Debug returns a new debug-client. It's used to get verbose logging on specific operations.
 //
 //	client.Debug().
-//		User.
+//		Group.
 //		Query().
 //		Count(ctx)
 func (c *Client) Debug() *Client {
@@ -178,18 +191,26 @@ func (c *Client) Close() error {
 // Use adds the mutation hooks to all the entity clients.
 // In order to add hooks to a specific client, call: `client.Node.Use(...)`.
 func (c *Client) Use(hooks ...Hook) {
+	c.Group.Use(hooks...)
+	c.Todo.Use(hooks...)
 	c.User.Use(hooks...)
 }
 
 // Intercept adds the query interceptors to all the entity clients.
 // In order to add interceptors to a specific client, call: `client.Node.Intercept(...)`.
 func (c *Client) Intercept(interceptors ...Interceptor) {
+	c.Group.Intercept(interceptors...)
+	c.Todo.Intercept(interceptors...)
 	c.User.Intercept(interceptors...)
 }
 
 // Mutate implements the ent.Mutator interface.
 func (c *Client) Mutate(ctx context.Context, m Mutation) (Value, error) {
 	switch m := m.(type) {
+	case *GroupMutation:
+		return c.Group.mutate(ctx, m)
+	case *TodoMutation:
+		return c.Todo.mutate(ctx, m)
 	case *UserMutation:
 		return c.User.mutate(ctx, m)
 	default:
@@ -197,6 +218,320 @@ func (c *Client) Mutate(ctx context.Context, m Mutation) (Value, error) {
 	}
 }
 
+// GroupClient is a client for the Group schema.
+type GroupClient struct {
+	config
+}
+
+// NewGroupClient returns a client for the Group from the given config.
+func NewGroupClient(c config) *GroupClient {
+	return &GroupClient{config: c}
+}
+
+// Use adds a list of mutation hooks to the hooks stack.
+// A call to `Use(f, g, h)` equals to `group.Hooks(f(g(h())))`.
+func (c *GroupClient) Use(hooks ...Hook) {
+	c.hooks.Group = append(c.hooks.Group, hooks...)
+}
+
+// Intercept adds a list of query interceptors to the interceptors stack.
+// A call to `Intercept(f, g, h)` equals to `group.Intercept(f(g(h())))`.
+func (c *GroupClient) Intercept(interceptors ...Interceptor) {
+	c.inters.Group = append(c.inters.Group, interceptors...)
+}
+
+// Create returns a builder for creating a Group entity.
+func (c *GroupClient) Create() *GroupCreate {
+	mutation := newGroupMutation(c.config, OpCreate)
+	return &GroupCreate{config: c.config, hooks: c.Hooks(), mutation: mutation}
+}
+
+// CreateBulk returns a builder for creating a bulk of Group entities.
+func (c *GroupClient) CreateBulk(builders ...*GroupCreate) *GroupCreateBulk {
+	return &GroupCreateBulk{config: c.config, builders: builders}
+}
+
+// MapCreateBulk creates a bulk creation builder from the given slice. For each item in the slice, the function creates
+// a builder and applies setFunc on it.
+func (c *GroupClient) MapCreateBulk(slice any, setFunc func(*GroupCreate, int)) *GroupCreateBulk {
+	rv := reflect.ValueOf(slice)
+	if rv.Kind() != reflect.Slice {
+		return &GroupCreateBulk{err: fmt.Errorf("calling to GroupClient.MapCreateBulk with wrong type %T, need slice", slice)}
+	}
+	builders := make([]*GroupCreate, rv.Len())
+	for i := 0; i < rv.Len(); i++ {
+		builders[i] = c.Create()
+		setFunc(builders[i], i)
+	}
+	return &GroupCreateBulk{config: c.config, builders: builders}
+}
+
+// Update returns an update builder for Group.
+func (c *GroupClient) Update() *GroupUpdate {
+	mutation := newGroupMutation(c.config, OpUpdate)
+	return &GroupUpdate{config: c.config, hooks: c.Hooks(), mutation: mutation}
+}
+
+// UpdateOne returns an update builder for the given entity.
+func (c *GroupClient) UpdateOne(_m *Group) *GroupUpdateOne {
+	mutation := newGroupMutation(c.config, OpUpdateOne, withGroup(_m))
+	return &GroupUpdateOne{config: c.config, hooks: c.Hooks(), mutation: mutation}
+}
+
+// UpdateOneID returns an update builder for the given id.
+func (c *GroupClient) UpdateOneID(id int) *GroupUpdateOne {
+	mutation := newGroupMutation(c.config, OpUpdateOne, withGroupID(id))
+	return &GroupUpdateOne{config: c.config, hooks: c.Hooks(), mutation: mutation}
+}
+
+// Delete returns a delete builder for Group.
+func (c *GroupClient) Delete() *GroupDelete {
+	mutation := newGroupMutation(c.config, OpDelete)
+	return &GroupDelete{config: c.config, hooks: c.Hooks(), mutation: mutation}
+}
+
+// DeleteOne returns a builder for deleting the given entity.
+func (c *GroupClient) DeleteOne(_m *Group) *GroupDeleteOne {
+	return c.DeleteOneID(_m.ID)
+}
+
+// DeleteOneID returns a builder for deleting the given entity by its id.
+func (c *GroupClient) DeleteOneID(id int) *GroupDeleteOne {
+	builder := c.Delete().Where(group.ID(id))
+	builder.mutation.id = &id
+	builder.mutation.op = OpDeleteOne
+	return &GroupDeleteOne{builder}
+}
+
+// Query returns a query builder for Group.
+func (c *GroupClient) Query() *GroupQuery {
+	return &GroupQuery{
+		config: c.config,
+		ctx:    &QueryContext{Type: TypeGroup},
+		inters: c.Interceptors(),
+	}
+}
+
+// Get returns a Group entity by its id.
+func (c *GroupClient) Get(ctx context.Context, id int) (*Group, error) {
+	return c.Query().Where(group.ID(id)).Only(ctx)
+}
+
+// GetX is like Get, but panics if an error occurs.
+func (c *GroupClient) GetX(ctx context.Context, id int) *Group {
+	obj, err := c.Get(ctx, id)
+	if err != nil {
+		panic(err)
+	}
+	return obj
+}
+
+// QueryUsers queries the users edge of a Group.
+func (c *GroupClient) QueryUsers(_m *Group) *UserQuery {
+	query := (&UserClient{config: c.config}).Query()
+	query.path = func(context.Context) (fromV *sql.Selector, _ error) {
+		id := _m.ID
+		step := sqlgraph.NewStep(
+			sqlgraph.From(group.Table, group.FieldID, id),
+			sqlgraph.To(user.Table, user.FieldID),
+			sqlgraph.Edge(sqlgraph.M2M, true, group.UsersTable, group.UsersPrimaryKey...),
+		)
+		fromV = sqlgraph.Neighbors(_m.driver.Dialect(), step)
+		return fromV, nil
+	}
+	return query
+}
+
+// QueryTodos queries the todos edge of a Group.
+func (c *GroupClient) QueryTodos(_m *Group) *TodoQuery {
+	query := (&TodoClient{config: c.config}).Query()
+	query.path = func(context.Context) (fromV *sql.Selector, _ error) {
+		id := _m.ID
+		step := sqlgraph.NewStep(
+			sqlgraph.From(group.Table, group.FieldID, id),
+			sqlgraph.To(todo.Table, todo.FieldID),
+			sqlgraph.Edge(sqlgraph.O2M, true, group.TodosTable, group.TodosColumn),
+		)
+		fromV = sqlgraph.Neighbors(_m.driver.Dialect(), step)
+		return fromV, nil
+	}
+	return query
+}
+
+// Hooks returns the client hooks.
+func (c *GroupClient) Hooks() []Hook {
+	return c.hooks.Group
+}
+
+// Interceptors returns the client interceptors.
+func (c *GroupClient) Interceptors() []Interceptor {
+	return c.inters.Group
+}
+
+func (c *GroupClient) mutate(ctx context.Context, m *GroupMutation) (Value, error) {
+	switch m.Op() {
+	case OpCreate:
+		return (&GroupCreate{config: c.config, hooks: c.Hooks(), mutation: m}).Save(ctx)
+	case OpUpdate:
+		return (&GroupUpdate{config: c.config, hooks: c.Hooks(), mutation: m}).Save(ctx)
+	case OpUpdateOne:
+		return (&GroupUpdateOne{config: c.config, hooks: c.Hooks(), mutation: m}).Save(ctx)
+	case OpDelete, OpDeleteOne:
+		return (&GroupDelete{config: c.config, hooks: c.Hooks(), mutation: m}).Exec(ctx)
+	default:
+		return nil, fmt.Errorf("ent: unknown Group mutation op: %q", m.Op())
+	}
+}
+
+// TodoClient is a client for the Todo schema.
+type TodoClient struct {
+	config
+}
+
+// NewTodoClient returns a client for the Todo from the given config.
+func NewTodoClient(c config) *TodoClient {
+	return &TodoClient{config: c}
+}
+
+// Use adds a list of mutation hooks to the hooks stack.
+// A call to `Use(f, g, h)` equals to `todo.Hooks(f(g(h())))`.
+func (c *TodoClient) Use(hooks ...Hook) {
+	c.hooks.Todo = append(c.hooks.Todo, hooks...)
+}
+
+// Intercept adds a list of query interceptors to the interceptors stack.
+// A call to `Intercept(f, g, h)` equals to `todo.Intercept(f(g(h())))`.
+func (c *TodoClient) Intercept(interceptors ...Interceptor) {
+	c.inters.Todo = append(c.inters.Todo, interceptors...)
+}
+
+// Create returns a builder for creating a Todo entity.
+func (c *TodoClient) Create() *TodoCreate {
+	mutation := newTodoMutation(c.config, OpCreate)
+	return &TodoCreate{config: c.config, hooks: c.Hooks(), mutation: mutation}
+}
+
+// CreateBulk returns a builder for creating a bulk of Todo entities.
+func (c *TodoClient) CreateBulk(builders ...*TodoCreate) *TodoCreateBulk {
+	return &TodoCreateBulk{config: c.config, builders: builders}
+}
+
+// MapCreateBulk creates a bulk creation builder from the given slice. For each item in the slice, the function creates
+// a builder and applies setFunc on it.
+func (c *TodoClient) MapCreateBulk(slice any, setFunc func(*TodoCreate, int)) *TodoCreateBulk {
+	rv := reflect.ValueOf(slice)
+	if rv.Kind() != reflect.Slice {
+		return &TodoCreateBulk{err: fmt.Errorf("calling to TodoClient.MapCreateBulk with wrong type %T, need slice", slice)}
+	}
+	builders := make([]*TodoCreate, rv.Len())
+	for i := 0; i < rv.Len(); i++ {
+		builders[i] = c.Create()
+		setFunc(builders[i], i)
+	}
+	return &TodoCreateBulk{config: c.config, builders: builders}
+}
+
+// Update returns an update builder for Todo.
+func (c *TodoClient) Update() *TodoUpdate {
+	mutation := newTodoMutation(c.config, OpUpdate)
+	return &TodoUpdate{config: c.config, hooks: c.Hooks(), mutation: mutation}
+}
+
+// UpdateOne returns an update builder for the given entity.
+func (c *TodoClient) UpdateOne(_m *Todo) *TodoUpdateOne {
+	mutation := newTodoMutation(c.config, OpUpdateOne, withTodo(_m))
+	return &TodoUpdateOne{config: c.config, hooks: c.Hooks(), mutation: mutation}
+}
+
+// UpdateOneID returns an update builder for the given id.
+func (c *TodoClient) UpdateOneID(id int) *TodoUpdateOne {
+	mutation := newTodoMutation(c.config, OpUpdateOne, withTodoID(id))
+	return &TodoUpdateOne{config: c.config, hooks: c.Hooks(), mutation: mutation}
+}
+
+// Delete returns a delete builder for Todo.
+func (c *TodoClient) Delete() *TodoDelete {
+	mutation := newTodoMutation(c.config, OpDelete)
+	return &TodoDelete{config: c.config, hooks: c.Hooks(), mutation: mutation}
+}
+
+// DeleteOne returns a builder for deleting the given entity.
+func (c *TodoClient) DeleteOne(_m *Todo) *TodoDeleteOne {
+	return c.DeleteOneID(_m.ID)
+}
+
+// DeleteOneID returns a builder for deleting the given entity by its id.
+func (c *TodoClient) DeleteOneID(id int) *TodoDeleteOne {
+	builder := c.Delete().Where(todo.ID(id))
+	builder.mutation.id = &id
+	builder.mutation.op = OpDeleteOne
+	return &TodoDeleteOne{builder}
+}
+
+// Query returns a query builder for Todo.
+func (c *TodoClient) Query() *TodoQuery {
+	return &TodoQuery{
+		config: c.config,
+		ctx:    &QueryContext{Type: TypeTodo},
+		inters: c.Interceptors(),
+	}
+}
+
+// Get returns a Todo entity by its id.
+func (c *TodoClient) Get(ctx context.Context, id int) (*Todo, error) {
+	return c.Query().Where(todo.ID(id)).Only(ctx)
+}
+
+// GetX is like Get, but panics if an error occurs.
+func (c *TodoClient) GetX(ctx context.Context, id int) *Todo {
+	obj, err := c.Get(ctx, id)
+	if err != nil {
+		panic(err)
+	}
+	return obj
+}
+
+// QueryGroup queries the group edge of a Todo.
+func (c *TodoClient) QueryGroup(_m *Todo) *GroupQuery {
+	query := (&GroupClient{config: c.config}).Query()
+	query.path = func(context.Context) (fromV *sql.Selector, _ error) {
+		id := _m.ID
+		step := sqlgraph.NewStep(
+			sqlgraph.From(todo.Table, todo.FieldID, id),
+			sqlgraph.To(group.Table, group.FieldID),
+			sqlgraph.Edge(sqlgraph.M2O, false, todo.GroupTable, todo.GroupColumn),
+		)
+		fromV = sqlgraph.Neighbors(_m.driver.Dialect(), step)
+		return fromV, nil
+	}
+	return query
+}
+
+// Hooks returns the client hooks.
+func (c *TodoClient) Hooks() []Hook {
+	return c.hooks.Todo
+}
+
+// Interceptors returns the client interceptors.
+func (c *TodoClient) Interceptors() []Interceptor {
+	return c.inters.Todo
+}
+
+func (c *TodoClient) mutate(ctx context.Context, m *TodoMutation) (Value, error) {
+	switch m.Op() {
+	case OpCreate:
+		return (&TodoCreate{config: c.config, hooks: c.Hooks(), mutation: m}).Save(ctx)
+	case OpUpdate:
+		return (&TodoUpdate{config: c.config, hooks: c.Hooks(), mutation: m}).Save(ctx)
+	case OpUpdateOne:
+		return (&TodoUpdateOne{config: c.config, hooks: c.Hooks(), mutation: m}).Save(ctx)
+	case OpDelete, OpDeleteOne:
+		return (&TodoDelete{config: c.config, hooks: c.Hooks(), mutation: m}).Exec(ctx)
+	default:
+		return nil, fmt.Errorf("ent: unknown Todo mutation op: %q", m.Op())
+	}
+}
+
 // UserClient is a client for the User schema.
 type UserClient struct {
 	config
@@ -305,6 +640,22 @@ func (c *UserClient) GetX(ctx context.Context, id int) *User {
 	return obj
 }
 
+// QueryGroup queries the group edge of a User.
+func (c *UserClient) QueryGroup(_m *User) *GroupQuery {
+	query := (&GroupClient{config: c.config}).Query()
+	query.path = func(context.Context) (fromV *sql.Selector, _ error) {
+		id := _m.ID
+		step := sqlgraph.NewStep(
+			sqlgraph.From(user.Table, user.FieldID, id),
+			sqlgraph.To(group.Table, group.FieldID),
+			sqlgraph.Edge(sqlgraph.M2M, false, user.GroupTable, user.GroupPrimaryKey...),
+		)
+		fromV = sqlgraph.Neighbors(_m.driver.Dialect(), step)
+		return fromV, nil
+	}
+	return query
+}
+
 // Hooks returns the client hooks.
 func (c *UserClient) Hooks() []Hook {
 	return c.hooks.User
@@ -333,9 +684,9 @@ func (c *UserClient) mutate(ctx context.Context, m *UserMutation) (Value, error)
 // hooks and interceptors per client, for fast access.
 type (
 	hooks struct {
-		User []ent.Hook
+		Group, Todo, User []ent.Hook
 	}
 	inters struct {
-		User []ent.Interceptor
+		Group, Todo, User []ent.Interceptor
 	}
 )

schema/ent/example/ent/ent.go

@@ -5,6 +5,8 @@ package ent
 import (
 	"context"
 	"errors"
+	"ersteller-lib/schema/ent/example/ent/group"
+	"ersteller-lib/schema/ent/example/ent/todo"
 	"ersteller-lib/schema/ent/example/ent/user"
 	"fmt"
 	"reflect"
@@ -73,7 +75,9 @@ var (
 func checkColumn(t, c string) error {
 	initCheck.Do(func() {
 		columnCheck = sql.NewColumnCheck(map[string]func(string) bool{
-			user.Table: user.ValidColumn,
+			group.Table: group.ValidColumn,
+			todo.Table:  todo.ValidColumn,
+			user.Table:  user.ValidColumn,
 		})
 	})
 	return columnCheck(t, c)

schema/ent/example/ent/group.go

@@ -0,0 +1,145 @@
+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"ersteller-lib/schema/ent/example/ent/group"
+	"fmt"
+	"strings"
+
+	"entgo.io/ent"
+	"entgo.io/ent/dialect/sql"
+)
+
+// Group is the model entity for the Group schema.
+type Group struct {
+	config `json:"-"`
+	// ID of the ent.
+	ID int `json:"id,omitempty"`
+	// Name holds the value of the "name" field.
+	Name string `json:"name,omitempty"`
+	// Edges holds the relations/edges for other nodes in the graph.
+	// The values are being populated by the GroupQuery when eager-loading is set.
+	Edges        GroupEdges `json:"edges"`
+	selectValues sql.SelectValues
+}
+
+// GroupEdges holds the relations/edges for other nodes in the graph.
+type GroupEdges struct {
+	// Users holds the value of the users edge.
+	Users []*User `json:"users,omitempty"`
+	// Todos holds the value of the todos edge.
+	Todos []*Todo `json:"todos,omitempty"`
+	// loadedTypes holds the information for reporting if a
+	// type was loaded (or requested) in eager-loading or not.
+	loadedTypes [2]bool
+}
+
+// UsersOrErr returns the Users value or an error if the edge
+// was not loaded in eager-loading.
+func (e GroupEdges) UsersOrErr() ([]*User, error) {
+	if e.loadedTypes[0] {
+		return e.Users, nil
+	}
+	return nil, &NotLoadedError{edge: "users"}
+}
+
+// TodosOrErr returns the Todos value or an error if the edge
+// was not loaded in eager-loading.
+func (e GroupEdges) TodosOrErr() ([]*Todo, error) {
+	if e.loadedTypes[1] {
+		return e.Todos, nil
+	}
+	return nil, &NotLoadedError{edge: "todos"}
+}
+
+// scanValues returns the types for scanning values from sql.Rows.
+func (*Group) scanValues(columns []string) ([]any, error) {
+	values := make([]any, len(columns))
+	for i := range columns {
+		switch columns[i] {
+		case group.FieldID:
+			values[i] = new(sql.NullInt64)
+		case group.FieldName:
+			values[i] = new(sql.NullString)
+		default:
+			values[i] = new(sql.UnknownType)
+		}
+	}
+	return values, nil
+}
+
+// assignValues assigns the values that were returned from sql.Rows (after scanning)
+// to the Group fields.
+func (_m *Group) assignValues(columns []string, values []any) error {
+	if m, n := len(values), len(columns); m < n {
+		return fmt.Errorf("mismatch number of scan values: %d != %d", m, n)
+	}
+	for i := range columns {
+		switch columns[i] {
+		case group.FieldID:
+			value, ok := values[i].(*sql.NullInt64)
+			if !ok {
+				return fmt.Errorf("unexpected type %T for field id", value)
+			}
+			_m.ID = int(value.Int64)
+		case group.FieldName:
+			if value, ok := values[i].(*sql.NullString); !ok {
+				return fmt.Errorf("unexpected type %T for field name", values[i])
+			} else if value.Valid {
+				_m.Name = value.String
+			}
+		default:
+			_m.selectValues.Set(columns[i], values[i])
+		}
+	}
+	return nil
+}
+
+// Value returns the ent.Value that was dynamically selected and assigned to the Group.
+// This includes values selected through modifiers, order, etc.
+func (_m *Group) Value(name string) (ent.Value, error) {
+	return _m.selectValues.Get(name)
+}
+
+// QueryUsers queries the "users" edge of the Group entity.
+func (_m *Group) QueryUsers() *UserQuery {
+	return NewGroupClient(_m.config).QueryUsers(_m)
+}
+
+// QueryTodos queries the "todos" edge of the Group entity.
+func (_m *Group) QueryTodos() *TodoQuery {
+	return NewGroupClient(_m.config).QueryTodos(_m)
+}
+
+// Update returns a builder for updating this Group.
+// Note that you need to call Group.Unwrap() before calling this method if this Group
+// was returned from a transaction, and the transaction was committed or rolled back.
+func (_m *Group) Update() *GroupUpdateOne {
+	return NewGroupClient(_m.config).UpdateOne(_m)
+}
+
+// Unwrap unwraps the Group entity that was returned from a transaction after it was closed,
+// so that all future queries will be executed through the driver which created the transaction.
+func (_m *Group) Unwrap() *Group {
+	_tx, ok := _m.config.driver.(*txDriver)
+	if !ok {
+		panic("ent: Group is not a transactional entity")
+	}
+	_m.config.driver = _tx.drv
+	return _m
+}
+
+// String implements the fmt.Stringer.
+func (_m *Group) String() string {
+	var builder strings.Builder
+	builder.WriteString("Group(")
+	builder.WriteString(fmt.Sprintf("id=%v, ", _m.ID))
+	builder.WriteString("name=")
+	builder.WriteString(_m.Name)
+	builder.WriteByte(')')
+	return builder.String()
+}
+
+// Groups is a parsable slice of Group.
+type Groups []*Group

schema/ent/example/ent/group/group.go

@@ -0,0 +1,117 @@
+// Code generated by ent, DO NOT EDIT.
+
+package group
+
+import (
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+)
+
+const (
+	// Label holds the string label denoting the group type in the database.
+	Label = "group"
+	// FieldID holds the string denoting the id field in the database.
+	FieldID = "id"
+	// FieldName holds the string denoting the name field in the database.
+	FieldName = "name"
+	// EdgeUsers holds the string denoting the users edge name in mutations.
+	EdgeUsers = "users"
+	// EdgeTodos holds the string denoting the todos edge name in mutations.
+	EdgeTodos = "todos"
+	// Table holds the table name of the group in the database.
+	Table = "groups"
+	// UsersTable is the table that holds the users relation/edge. The primary key declared below.
+	UsersTable = "user_group"
+	// UsersInverseTable is the table name for the User entity.
+	// It exists in this package in order to avoid circular dependency with the "user" package.
+	UsersInverseTable = "users"
+	// TodosTable is the table that holds the todos relation/edge.
+	TodosTable = "todos"
+	// TodosInverseTable is the table name for the Todo entity.
+	// It exists in this package in order to avoid circular dependency with the "todo" package.
+	TodosInverseTable = "todos"
+	// TodosColumn is the table column denoting the todos relation/edge.
+	TodosColumn = "todo_group"
+)
+
+// Columns holds all SQL columns for group fields.
+var Columns = []string{
+	FieldID,
+	FieldName,
+}
+
+var (
+	// UsersPrimaryKey and UsersColumn2 are the table columns denoting the
+	// primary key for the users relation (M2M).
+	UsersPrimaryKey = []string{"user_id", "group_id"}
+)
+
+// ValidColumn reports if the column name is valid (part of the table columns).
+func ValidColumn(column string) bool {
+	for i := range Columns {
+		if column == Columns[i] {
+			return true
+		}
+	}
+	return false
+}
+
+var (
+	// DefaultName holds the default value on creation for the "name" field.
+	DefaultName string
+)
+
+// OrderOption defines the ordering options for the Group queries.
+type OrderOption func(*sql.Selector)
+
+// ByID orders the results by the id field.
+func ByID(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldID, opts...).ToFunc()
+}
+
+// ByName orders the results by the name field.
+func ByName(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldName, opts...).ToFunc()
+}
+
+// ByUsersCount orders the results by users count.
+func ByUsersCount(opts ...sql.OrderTermOption) OrderOption {
+	return func(s *sql.Selector) {
+		sqlgraph.OrderByNeighborsCount(s, newUsersStep(), opts...)
+	}
+}
+
+// ByUsers orders the results by users terms.
+func ByUsers(term sql.OrderTerm, terms ...sql.OrderTerm) OrderOption {
+	return func(s *sql.Selector) {
+		sqlgraph.OrderByNeighborTerms(s, newUsersStep(), append([]sql.OrderTerm{term}, terms...)...)
+	}
+}
+
+// ByTodosCount orders the results by todos count.
+func ByTodosCount(opts ...sql.OrderTermOption) OrderOption {
+	return func(s *sql.Selector) {
+		sqlgraph.OrderByNeighborsCount(s, newTodosStep(), opts...)
+	}
+}
+
+// ByTodos orders the results by todos terms.
+func ByTodos(term sql.OrderTerm, terms ...sql.OrderTerm) OrderOption {
+	return func(s *sql.Selector) {
+		sqlgraph.OrderByNeighborTerms(s, newTodosStep(), append([]sql.OrderTerm{term}, terms...)...)
+	}
+}
+func newUsersStep() *sqlgraph.Step {
+	return sqlgraph.NewStep(
+		sqlgraph.From(Table, FieldID),
+		sqlgraph.To(UsersInverseTable, FieldID),
+		sqlgraph.Edge(sqlgraph.M2M, true, UsersTable, UsersPrimaryKey...),
+	)
+}
+func newTodosStep() *sqlgraph.Step {
+	return sqlgraph.NewStep(
+		sqlgraph.From(Table, FieldID),
+		sqlgraph.To(TodosInverseTable, FieldID),
+		sqlgraph.Edge(sqlgraph.O2M, true, TodosTable, TodosColumn),
+	)
+}

schema/ent/example/ent/group/where.go

@@ -0,0 +1,186 @@
+// Code generated by ent, DO NOT EDIT.
+
+package group
+
+import (
+	"ersteller-lib/schema/ent/example/ent/predicate"
+
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+)
+
+// ID filters vertices based on their ID field.
+func ID(id int) predicate.Group {
+	return predicate.Group(sql.FieldEQ(FieldID, id))
+}
+
+// IDEQ applies the EQ predicate on the ID field.
+func IDEQ(id int) predicate.Group {
+	return predicate.Group(sql.FieldEQ(FieldID, id))
+}
+
+// IDNEQ applies the NEQ predicate on the ID field.
+func IDNEQ(id int) predicate.Group {
+	return predicate.Group(sql.FieldNEQ(FieldID, id))
+}
+
+// IDIn applies the In predicate on the ID field.
+func IDIn(ids ...int) predicate.Group {
+	return predicate.Group(sql.FieldIn(FieldID, ids...))
+}
+
+// IDNotIn applies the NotIn predicate on the ID field.
+func IDNotIn(ids ...int) predicate.Group {
+	return predicate.Group(sql.FieldNotIn(FieldID, ids...))
+}
+
+// IDGT applies the GT predicate on the ID field.
+func IDGT(id int) predicate.Group {
+	return predicate.Group(sql.FieldGT(FieldID, id))
+}
+
+// IDGTE applies the GTE predicate on the ID field.
+func IDGTE(id int) predicate.Group {
+	return predicate.Group(sql.FieldGTE(FieldID, id))
+}
+
+// IDLT applies the LT predicate on the ID field.
+func IDLT(id int) predicate.Group {
+	return predicate.Group(sql.FieldLT(FieldID, id))
+}
+
+// IDLTE applies the LTE predicate on the ID field.
+func IDLTE(id int) predicate.Group {
+	return predicate.Group(sql.FieldLTE(FieldID, id))
+}
+
+// Name applies equality check predicate on the "name" field. It's identical to NameEQ.
+func Name(v string) predicate.Group {
+	return predicate.Group(sql.FieldEQ(FieldName, v))
+}
+
+// NameEQ applies the EQ predicate on the "name" field.
+func NameEQ(v string) predicate.Group {
+	return predicate.Group(sql.FieldEQ(FieldName, v))
+}
+
+// NameNEQ applies the NEQ predicate on the "name" field.
+func NameNEQ(v string) predicate.Group {
+	return predicate.Group(sql.FieldNEQ(FieldName, v))
+}
+
+// NameIn applies the In predicate on the "name" field.
+func NameIn(vs ...string) predicate.Group {
+	return predicate.Group(sql.FieldIn(FieldName, vs...))
+}
+
+// NameNotIn applies the NotIn predicate on the "name" field.
+func NameNotIn(vs ...string) predicate.Group {
+	return predicate.Group(sql.FieldNotIn(FieldName, vs...))
+}
+
+// NameGT applies the GT predicate on the "name" field.
+func NameGT(v string) predicate.Group {
+	return predicate.Group(sql.FieldGT(FieldName, v))
+}
+
+// NameGTE applies the GTE predicate on the "name" field.
+func NameGTE(v string) predicate.Group {
+	return predicate.Group(sql.FieldGTE(FieldName, v))
+}
+
+// NameLT applies the LT predicate on the "name" field.
+func NameLT(v string) predicate.Group {
+	return predicate.Group(sql.FieldLT(FieldName, v))
+}
+
+// NameLTE applies the LTE predicate on the "name" field.
+func NameLTE(v string) predicate.Group {
+	return predicate.Group(sql.FieldLTE(FieldName, v))
+}
+
+// NameContains applies the Contains predicate on the "name" field.
+func NameContains(v string) predicate.Group {
+	return predicate.Group(sql.FieldContains(FieldName, v))
+}
+
+// NameHasPrefix applies the HasPrefix predicate on the "name" field.
+func NameHasPrefix(v string) predicate.Group {
+	return predicate.Group(sql.FieldHasPrefix(FieldName, v))
+}
+
+// NameHasSuffix applies the HasSuffix predicate on the "name" field.
+func NameHasSuffix(v string) predicate.Group {
+	return predicate.Group(sql.FieldHasSuffix(FieldName, v))
+}
+
+// NameEqualFold applies the EqualFold predicate on the "name" field.
+func NameEqualFold(v string) predicate.Group {
+	return predicate.Group(sql.FieldEqualFold(FieldName, v))
+}
+
+// NameContainsFold applies the ContainsFold predicate on the "name" field.
+func NameContainsFold(v string) predicate.Group {
+	return predicate.Group(sql.FieldContainsFold(FieldName, v))
+}
+
+// HasUsers applies the HasEdge predicate on the "users" edge.
+func HasUsers() predicate.Group {
+	return predicate.Group(func(s *sql.Selector) {
+		step := sqlgraph.NewStep(
+			sqlgraph.From(Table, FieldID),
+			sqlgraph.Edge(sqlgraph.M2M, true, UsersTable, UsersPrimaryKey...),
+		)
+		sqlgraph.HasNeighbors(s, step)
+	})
+}
+
+// HasUsersWith applies the HasEdge predicate on the "users" edge with a given conditions (other predicates).
+func HasUsersWith(preds ...predicate.User) predicate.Group {
+	return predicate.Group(func(s *sql.Selector) {
+		step := newUsersStep()
+		sqlgraph.HasNeighborsWith(s, step, func(s *sql.Selector) {
+			for _, p := range preds {
+				p(s)
+			}
+		})
+	})
+}
+
+// HasTodos applies the HasEdge predicate on the "todos" edge.
+func HasTodos() predicate.Group {
+	return predicate.Group(func(s *sql.Selector) {
+		step := sqlgraph.NewStep(
+			sqlgraph.From(Table, FieldID),
+			sqlgraph.Edge(sqlgraph.O2M, true, TodosTable, TodosColumn),
+		)
+		sqlgraph.HasNeighbors(s, step)
+	})
+}
+
+// HasTodosWith applies the HasEdge predicate on the "todos" edge with a given conditions (other predicates).
+func HasTodosWith(preds ...predicate.Todo) predicate.Group {
+	return predicate.Group(func(s *sql.Selector) {
+		step := newTodosStep()
+		sqlgraph.HasNeighborsWith(s, step, func(s *sql.Selector) {
+			for _, p := range preds {
+				p(s)
+			}
+		})
+	})
+}
+
+// And groups predicates with the AND operator between them.
+func And(predicates ...predicate.Group) predicate.Group {
+	return predicate.Group(sql.AndPredicates(predicates...))
+}
+
+// Or groups predicates with the OR operator between them.
+func Or(predicates ...predicate.Group) predicate.Group {
+	return predicate.Group(sql.OrPredicates(predicates...))
+}
+
+// Not applies the not operator on the given predicate.
+func Not(p predicate.Group) predicate.Group {
+	return predicate.Group(sql.NotPredicates(p))
+}

schema/ent/example/ent/group_create.go

@@ -0,0 +1,265 @@
+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"context"
+	"errors"
+	"ersteller-lib/schema/ent/example/ent/group"
+	"ersteller-lib/schema/ent/example/ent/todo"
+	"ersteller-lib/schema/ent/example/ent/user"
+	"fmt"
+
+	"entgo.io/ent/dialect/sql/sqlgraph"
+	"entgo.io/ent/schema/field"
+)
+
+// GroupCreate is the builder for creating a Group entity.
+type GroupCreate struct {
+	config
+	mutation *GroupMutation
+	hooks    []Hook
+}
+
+// SetName sets the "name" field.
+func (_c *GroupCreate) SetName(v string) *GroupCreate {
+	_c.mutation.SetName(v)
+	return _c
+}
+
+// SetNillableName sets the "name" field if the given value is not nil.
+func (_c *GroupCreate) SetNillableName(v *string) *GroupCreate {
+	if v != nil {
+		_c.SetName(*v)
+	}
+	return _c
+}
+
+// AddUserIDs adds the "users" edge to the User entity by IDs.
+func (_c *GroupCreate) AddUserIDs(ids ...int) *GroupCreate {
+	_c.mutation.AddUserIDs(ids...)
+	return _c
+}
+
+// AddUsers adds the "users" edges to the User entity.
+func (_c *GroupCreate) AddUsers(v ...*User) *GroupCreate {
+	ids := make([]int, len(v))
+	for i := range v {
+		ids[i] = v[i].ID
+	}
+	return _c.AddUserIDs(ids...)
+}
+
+// AddTodoIDs adds the "todos" edge to the Todo entity by IDs.
+func (_c *GroupCreate) AddTodoIDs(ids ...int) *GroupCreate {
+	_c.mutation.AddTodoIDs(ids...)
+	return _c
+}
+
+// AddTodos adds the "todos" edges to the Todo entity.
+func (_c *GroupCreate) AddTodos(v ...*Todo) *GroupCreate {
+	ids := make([]int, len(v))
+	for i := range v {
+		ids[i] = v[i].ID
+	}
+	return _c.AddTodoIDs(ids...)
+}
+
+// Mutation returns the GroupMutation object of the builder.
+func (_c *GroupCreate) Mutation() *GroupMutation {
+	return _c.mutation
+}
+
+// Save creates the Group in the database.
+func (_c *GroupCreate) Save(ctx context.Context) (*Group, error) {
+	_c.defaults()
+	return withHooks(ctx, _c.sqlSave, _c.mutation, _c.hooks)
+}
+
+// SaveX calls Save and panics if Save returns an error.
+func (_c *GroupCreate) SaveX(ctx context.Context) *Group {
+	v, err := _c.Save(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return v
+}
+
+// Exec executes the query.
+func (_c *GroupCreate) Exec(ctx context.Context) error {
+	_, err := _c.Save(ctx)
+	return err
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_c *GroupCreate) ExecX(ctx context.Context) {
+	if err := _c.Exec(ctx); err != nil {
+		panic(err)
+	}
+}
+
+// defaults sets the default values of the builder before save.
+func (_c *GroupCreate) defaults() {
+	if _, ok := _c.mutation.Name(); !ok {
+		v := group.DefaultName
+		_c.mutation.SetName(v)
+	}
+}
+
+// check runs all checks and user-defined validators on the builder.
+func (_c *GroupCreate) check() error {
+	if _, ok := _c.mutation.Name(); !ok {
+		return &ValidationError{Name: "name", err: errors.New(`ent: missing required field "Group.name"`)}
+	}
+	return nil
+}
+
+func (_c *GroupCreate) sqlSave(ctx context.Context) (*Group, error) {
+	if err := _c.check(); err != nil {
+		return nil, err
+	}
+	_node, _spec := _c.createSpec()
+	if err := sqlgraph.CreateNode(ctx, _c.driver, _spec); err != nil {
+		if sqlgraph.IsConstraintError(err) {
+			err = &ConstraintError{msg: err.Error(), wrap: err}
+		}
+		return nil, err
+	}
+	id := _spec.ID.Value.(int64)
+	_node.ID = int(id)
+	_c.mutation.id = &_node.ID
+	_c.mutation.done = true
+	return _node, nil
+}
+
+func (_c *GroupCreate) createSpec() (*Group, *sqlgraph.CreateSpec) {
+	var (
+		_node = &Group{config: _c.config}
+		_spec = sqlgraph.NewCreateSpec(group.Table, sqlgraph.NewFieldSpec(group.FieldID, field.TypeInt))
+	)
+	if value, ok := _c.mutation.Name(); ok {
+		_spec.SetField(group.FieldName, field.TypeString, value)
+		_node.Name = value
+	}
+	if nodes := _c.mutation.UsersIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2M,
+			Inverse: true,
+			Table:   group.UsersTable,
+			Columns: group.UsersPrimaryKey,
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(user.FieldID, field.TypeInt),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges = append(_spec.Edges, edge)
+	}
+	if nodes := _c.mutation.TodosIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: true,
+			Table:   group.TodosTable,
+			Columns: []string{group.TodosColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(todo.FieldID, field.TypeInt),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges = append(_spec.Edges, edge)
+	}
+	return _node, _spec
+}
+
+// GroupCreateBulk is the builder for creating many Group entities in bulk.
+type GroupCreateBulk struct {
+	config
+	err      error
+	builders []*GroupCreate
+}
+
+// Save creates the Group entities in the database.
+func (_c *GroupCreateBulk) Save(ctx context.Context) ([]*Group, error) {
+	if _c.err != nil {
+		return nil, _c.err
+	}
+	specs := make([]*sqlgraph.CreateSpec, len(_c.builders))
+	nodes := make([]*Group, len(_c.builders))
+	mutators := make([]Mutator, len(_c.builders))
+	for i := range _c.builders {
+		func(i int, root context.Context) {
+			builder := _c.builders[i]
+			builder.defaults()
+			var mut Mutator = MutateFunc(func(ctx context.Context, m Mutation) (Value, error) {
+				mutation, ok := m.(*GroupMutation)
+				if !ok {
+					return nil, fmt.Errorf("unexpected mutation type %T", m)
+				}
+				if err := builder.check(); err != nil {
+					return nil, err
+				}
+				builder.mutation = mutation
+				var err error
+				nodes[i], specs[i] = builder.createSpec()
+				if i < len(mutators)-1 {
+					_, err = mutators[i+1].Mutate(root, _c.builders[i+1].mutation)
+				} else {
+					spec := &sqlgraph.BatchCreateSpec{Nodes: specs}
+					// Invoke the actual operation on the latest mutation in the chain.
+					if err = sqlgraph.BatchCreate(ctx, _c.driver, spec); err != nil {
+						if sqlgraph.IsConstraintError(err) {
+							err = &ConstraintError{msg: err.Error(), wrap: err}
+						}
+					}
+				}
+				if err != nil {
+					return nil, err
+				}
+				mutation.id = &nodes[i].ID
+				if specs[i].ID.Value != nil {
+					id := specs[i].ID.Value.(int64)
+					nodes[i].ID = int(id)
+				}
+				mutation.done = true
+				return nodes[i], nil
+			})
+			for i := len(builder.hooks) - 1; i >= 0; i-- {
+				mut = builder.hooks[i](mut)
+			}
+			mutators[i] = mut
+		}(i, ctx)
+	}
+	if len(mutators) > 0 {
+		if _, err := mutators[0].Mutate(ctx, _c.builders[0].mutation); err != nil {
+			return nil, err
+		}
+	}
+	return nodes, nil
+}
+
+// SaveX is like Save, but panics if an error occurs.
+func (_c *GroupCreateBulk) SaveX(ctx context.Context) []*Group {
+	v, err := _c.Save(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return v
+}
+
+// Exec executes the query.
+func (_c *GroupCreateBulk) Exec(ctx context.Context) error {
+	_, err := _c.Save(ctx)
+	return err
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_c *GroupCreateBulk) ExecX(ctx context.Context) {
+	if err := _c.Exec(ctx); err != nil {
+		panic(err)
+	}
+}

schema/ent/example/ent/group_delete.go

@@ -0,0 +1,88 @@
+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"context"
+	"ersteller-lib/schema/ent/example/ent/group"
+	"ersteller-lib/schema/ent/example/ent/predicate"
+
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+	"entgo.io/ent/schema/field"
+)
+
+// GroupDelete is the builder for deleting a Group entity.
+type GroupDelete struct {
+	config
+	hooks    []Hook
+	mutation *GroupMutation
+}
+
+// Where appends a list predicates to the GroupDelete builder.
+func (_d *GroupDelete) Where(ps ...predicate.Group) *GroupDelete {
+	_d.mutation.Where(ps...)
+	return _d
+}
+
+// Exec executes the deletion query and returns how many vertices were deleted.
+func (_d *GroupDelete) Exec(ctx context.Context) (int, error) {
+	return withHooks(ctx, _d.sqlExec, _d.mutation, _d.hooks)
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_d *GroupDelete) ExecX(ctx context.Context) int {
+	n, err := _d.Exec(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return n
+}
+
+func (_d *GroupDelete) sqlExec(ctx context.Context) (int, error) {
+	_spec := sqlgraph.NewDeleteSpec(group.Table, sqlgraph.NewFieldSpec(group.FieldID, field.TypeInt))
+	if ps := _d.mutation.predicates; len(ps) > 0 {
+		_spec.Predicate = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	affected, err := sqlgraph.DeleteNodes(ctx, _d.driver, _spec)
+	if err != nil && sqlgraph.IsConstraintError(err) {
+		err = &ConstraintError{msg: err.Error(), wrap: err}
+	}
+	_d.mutation.done = true
+	return affected, err
+}
+
+// GroupDeleteOne is the builder for deleting a single Group entity.
+type GroupDeleteOne struct {
+	_d *GroupDelete
+}
+
+// Where appends a list predicates to the GroupDelete builder.
+func (_d *GroupDeleteOne) Where(ps ...predicate.Group) *GroupDeleteOne {
+	_d._d.mutation.Where(ps...)
+	return _d
+}
+
+// Exec executes the deletion query.
+func (_d *GroupDeleteOne) Exec(ctx context.Context) error {
+	n, err := _d._d.Exec(ctx)
+	switch {
+	case err != nil:
+		return err
+	case n == 0:
+		return &NotFoundError{group.Label}
+	default:
+		return nil
+	}
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_d *GroupDeleteOne) ExecX(ctx context.Context) {
+	if err := _d.Exec(ctx); err != nil {
+		panic(err)
+	}
+}

schema/ent/example/ent/group_query.go

@@ -0,0 +1,712 @@
+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"context"
+	"database/sql/driver"
+	"ersteller-lib/schema/ent/example/ent/group"
+	"ersteller-lib/schema/ent/example/ent/predicate"
+	"ersteller-lib/schema/ent/example/ent/todo"
+	"ersteller-lib/schema/ent/example/ent/user"
+	"fmt"
+	"math"
+
+	"entgo.io/ent"
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+	"entgo.io/ent/schema/field"
+)
+
+// GroupQuery is the builder for querying Group entities.
+type GroupQuery struct {
+	config
+	ctx        *QueryContext
+	order      []group.OrderOption
+	inters     []Interceptor
+	predicates []predicate.Group
+	withUsers  *UserQuery
+	withTodos  *TodoQuery
+	// intermediate query (i.e. traversal path).
+	sql  *sql.Selector
+	path func(context.Context) (*sql.Selector, error)
+}
+
+// Where adds a new predicate for the GroupQuery builder.
+func (_q *GroupQuery) Where(ps ...predicate.Group) *GroupQuery {
+	_q.predicates = append(_q.predicates, ps...)
+	return _q
+}
+
+// Limit the number of records to be returned by this query.
+func (_q *GroupQuery) Limit(limit int) *GroupQuery {
+	_q.ctx.Limit = &limit
+	return _q
+}
+
+// Offset to start from.
+func (_q *GroupQuery) Offset(offset int) *GroupQuery {
+	_q.ctx.Offset = &offset
+	return _q
+}
+
+// Unique configures the query builder to filter duplicate records on query.
+// By default, unique is set to true, and can be disabled using this method.
+func (_q *GroupQuery) Unique(unique bool) *GroupQuery {
+	_q.ctx.Unique = &unique
+	return _q
+}
+
+// Order specifies how the records should be ordered.
+func (_q *GroupQuery) Order(o ...group.OrderOption) *GroupQuery {
+	_q.order = append(_q.order, o...)
+	return _q
+}
+
+// QueryUsers chains the current query on the "users" edge.
+func (_q *GroupQuery) QueryUsers() *UserQuery {
+	query := (&UserClient{config: _q.config}).Query()
+	query.path = func(ctx context.Context) (fromU *sql.Selector, err error) {
+		if err := _q.prepareQuery(ctx); err != nil {
+			return nil, err
+		}
+		selector := _q.sqlQuery(ctx)
+		if err := selector.Err(); err != nil {
+			return nil, err
+		}
+		step := sqlgraph.NewStep(
+			sqlgraph.From(group.Table, group.FieldID, selector),
+			sqlgraph.To(user.Table, user.FieldID),
+			sqlgraph.Edge(sqlgraph.M2M, true, group.UsersTable, group.UsersPrimaryKey...),
+		)
+		fromU = sqlgraph.SetNeighbors(_q.driver.Dialect(), step)
+		return fromU, nil
+	}
+	return query
+}
+
+// QueryTodos chains the current query on the "todos" edge.
+func (_q *GroupQuery) QueryTodos() *TodoQuery {
+	query := (&TodoClient{config: _q.config}).Query()
+	query.path = func(ctx context.Context) (fromU *sql.Selector, err error) {
+		if err := _q.prepareQuery(ctx); err != nil {
+			return nil, err
+		}
+		selector := _q.sqlQuery(ctx)
+		if err := selector.Err(); err != nil {
+			return nil, err
+		}
+		step := sqlgraph.NewStep(
+			sqlgraph.From(group.Table, group.FieldID, selector),
+			sqlgraph.To(todo.Table, todo.FieldID),
+			sqlgraph.Edge(sqlgraph.O2M, true, group.TodosTable, group.TodosColumn),
+		)
+		fromU = sqlgraph.SetNeighbors(_q.driver.Dialect(), step)
+		return fromU, nil
+	}
+	return query
+}
+
+// First returns the first Group entity from the query.
+// Returns a *NotFoundError when no Group was found.
+func (_q *GroupQuery) First(ctx context.Context) (*Group, error) {
+	nodes, err := _q.Limit(1).All(setContextOp(ctx, _q.ctx, ent.OpQueryFirst))
+	if err != nil {
+		return nil, err
+	}
+	if len(nodes) == 0 {
+		return nil, &NotFoundError{group.Label}
+	}
+	return nodes[0], nil
+}
+
+// FirstX is like First, but panics if an error occurs.
+func (_q *GroupQuery) FirstX(ctx context.Context) *Group {
+	node, err := _q.First(ctx)
+	if err != nil && !IsNotFound(err) {
+		panic(err)
+	}
+	return node
+}
+
+// FirstID returns the first Group ID from the query.
+// Returns a *NotFoundError when no Group ID was found.
+func (_q *GroupQuery) FirstID(ctx context.Context) (id int, err error) {
+	var ids []int
+	if ids, err = _q.Limit(1).IDs(setContextOp(ctx, _q.ctx, ent.OpQueryFirstID)); err != nil {
+		return
+	}
+	if len(ids) == 0 {
+		err = &NotFoundError{group.Label}
+		return
+	}
+	return ids[0], nil
+}
+
+// FirstIDX is like FirstID, but panics if an error occurs.
+func (_q *GroupQuery) FirstIDX(ctx context.Context) int {
+	id, err := _q.FirstID(ctx)
+	if err != nil && !IsNotFound(err) {
+		panic(err)
+	}
+	return id
+}
+
+// Only returns a single Group entity found by the query, ensuring it only returns one.
+// Returns a *NotSingularError when more than one Group entity is found.
+// Returns a *NotFoundError when no Group entities are found.
+func (_q *GroupQuery) Only(ctx context.Context) (*Group, error) {
+	nodes, err := _q.Limit(2).All(setContextOp(ctx, _q.ctx, ent.OpQueryOnly))
+	if err != nil {
+		return nil, err
+	}
+	switch len(nodes) {
+	case 1:
+		return nodes[0], nil
+	case 0:
+		return nil, &NotFoundError{group.Label}
+	default:
+		return nil, &NotSingularError{group.Label}
+	}
+}
+
+// OnlyX is like Only, but panics if an error occurs.
+func (_q *GroupQuery) OnlyX(ctx context.Context) *Group {
+	node, err := _q.Only(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return node
+}
+
+// OnlyID is like Only, but returns the only Group ID in the query.
+// Returns a *NotSingularError when more than one Group ID is found.
+// Returns a *NotFoundError when no entities are found.
+func (_q *GroupQuery) OnlyID(ctx context.Context) (id int, err error) {
+	var ids []int
+	if ids, err = _q.Limit(2).IDs(setContextOp(ctx, _q.ctx, ent.OpQueryOnlyID)); err != nil {
+		return
+	}
+	switch len(ids) {
+	case 1:
+		id = ids[0]
+	case 0:
+		err = &NotFoundError{group.Label}
+	default:
+		err = &NotSingularError{group.Label}
+	}
+	return
+}
+
+// OnlyIDX is like OnlyID, but panics if an error occurs.
+func (_q *GroupQuery) OnlyIDX(ctx context.Context) int {
+	id, err := _q.OnlyID(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return id
+}
+
+// All executes the query and returns a list of Groups.
+func (_q *GroupQuery) All(ctx context.Context) ([]*Group, error) {
+	ctx = setContextOp(ctx, _q.ctx, ent.OpQueryAll)
+	if err := _q.prepareQuery(ctx); err != nil {
+		return nil, err
+	}
+	qr := querierAll[[]*Group, *GroupQuery]()
+	return withInterceptors[[]*Group](ctx, _q, qr, _q.inters)
+}
+
+// AllX is like All, but panics if an error occurs.
+func (_q *GroupQuery) AllX(ctx context.Context) []*Group {
+	nodes, err := _q.All(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return nodes
+}
+
+// IDs executes the query and returns a list of Group IDs.
+func (_q *GroupQuery) IDs(ctx context.Context) (ids []int, err error) {
+	if _q.ctx.Unique == nil && _q.path != nil {
+		_q.Unique(true)
+	}
+	ctx = setContextOp(ctx, _q.ctx, ent.OpQueryIDs)
+	if err = _q.Select(group.FieldID).Scan(ctx, &ids); err != nil {
+		return nil, err
+	}
+	return ids, nil
+}
+
+// IDsX is like IDs, but panics if an error occurs.
+func (_q *GroupQuery) IDsX(ctx context.Context) []int {
+	ids, err := _q.IDs(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return ids
+}
+
+// Count returns the count of the given query.
+func (_q *GroupQuery) Count(ctx context.Context) (int, error) {
+	ctx = setContextOp(ctx, _q.ctx, ent.OpQueryCount)
+	if err := _q.prepareQuery(ctx); err != nil {
+		return 0, err
+	}
+	return withInterceptors[int](ctx, _q, querierCount[*GroupQuery](), _q.inters)
+}
+
+// CountX is like Count, but panics if an error occurs.
+func (_q *GroupQuery) CountX(ctx context.Context) int {
+	count, err := _q.Count(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return count
+}
+
+// Exist returns true if the query has elements in the graph.
+func (_q *GroupQuery) Exist(ctx context.Context) (bool, error) {
+	ctx = setContextOp(ctx, _q.ctx, ent.OpQueryExist)
+	switch _, err := _q.FirstID(ctx); {
+	case IsNotFound(err):
+		return false, nil
+	case err != nil:
+		return false, fmt.Errorf("ent: check existence: %w", err)
+	default:
+		return true, nil
+	}
+}
+
+// ExistX is like Exist, but panics if an error occurs.
+func (_q *GroupQuery) ExistX(ctx context.Context) bool {
+	exist, err := _q.Exist(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return exist
+}
+
+// Clone returns a duplicate of the GroupQuery builder, including all associated steps. It can be
+// used to prepare common query builders and use them differently after the clone is made.
+func (_q *GroupQuery) Clone() *GroupQuery {
+	if _q == nil {
+		return nil
+	}
+	return &GroupQuery{
+		config:     _q.config,
+		ctx:        _q.ctx.Clone(),
+		order:      append([]group.OrderOption{}, _q.order...),
+		inters:     append([]Interceptor{}, _q.inters...),
+		predicates: append([]predicate.Group{}, _q.predicates...),
+		withUsers:  _q.withUsers.Clone(),
+		withTodos:  _q.withTodos.Clone(),
+		// clone intermediate query.
+		sql:  _q.sql.Clone(),
+		path: _q.path,
+	}
+}
+
+// WithUsers tells the query-builder to eager-load the nodes that are connected to
+// the "users" edge. The optional arguments are used to configure the query builder of the edge.
+func (_q *GroupQuery) WithUsers(opts ...func(*UserQuery)) *GroupQuery {
+	query := (&UserClient{config: _q.config}).Query()
+	for _, opt := range opts {
+		opt(query)
+	}
+	_q.withUsers = query
+	return _q
+}
+
+// WithTodos tells the query-builder to eager-load the nodes that are connected to
+// the "todos" edge. The optional arguments are used to configure the query builder of the edge.
+func (_q *GroupQuery) WithTodos(opts ...func(*TodoQuery)) *GroupQuery {
+	query := (&TodoClient{config: _q.config}).Query()
+	for _, opt := range opts {
+		opt(query)
+	}
+	_q.withTodos = query
+	return _q
+}
+
+// GroupBy is used to group vertices by one or more fields/columns.
+// It is often used with aggregate functions, like: count, max, mean, min, sum.
+//
+// Example:
+//
+//	var v []struct {
+//		Name string `json:"name,omitempty"`
+//		Count int `json:"count,omitempty"`
+//	}
+//
+//	client.Group.Query().
+//		GroupBy(group.FieldName).
+//		Aggregate(ent.Count()).
+//		Scan(ctx, &v)
+func (_q *GroupQuery) GroupBy(field string, fields ...string) *GroupGroupBy {
+	_q.ctx.Fields = append([]string{field}, fields...)
+	grbuild := &GroupGroupBy{build: _q}
+	grbuild.flds = &_q.ctx.Fields
+	grbuild.label = group.Label
+	grbuild.scan = grbuild.Scan
+	return grbuild
+}
+
+// Select allows the selection one or more fields/columns for the given query,
+// instead of selecting all fields in the entity.
+//
+// Example:
+//
+//	var v []struct {
+//		Name string `json:"name,omitempty"`
+//	}
+//
+//	client.Group.Query().
+//		Select(group.FieldName).
+//		Scan(ctx, &v)
+func (_q *GroupQuery) Select(fields ...string) *GroupSelect {
+	_q.ctx.Fields = append(_q.ctx.Fields, fields...)
+	sbuild := &GroupSelect{GroupQuery: _q}
+	sbuild.label = group.Label
+	sbuild.flds, sbuild.scan = &_q.ctx.Fields, sbuild.Scan
+	return sbuild
+}
+
+// Aggregate returns a GroupSelect configured with the given aggregations.
+func (_q *GroupQuery) Aggregate(fns ...AggregateFunc) *GroupSelect {
+	return _q.Select().Aggregate(fns...)
+}
+
+func (_q *GroupQuery) prepareQuery(ctx context.Context) error {
+	for _, inter := range _q.inters {
+		if inter == nil {
+			return fmt.Errorf("ent: uninitialized interceptor (forgotten import ent/runtime?)")
+		}
+		if trv, ok := inter.(Traverser); ok {
+			if err := trv.Traverse(ctx, _q); err != nil {
+				return err
+			}
+		}
+	}
+	for _, f := range _q.ctx.Fields {
+		if !group.ValidColumn(f) {
+			return &ValidationError{Name: f, err: fmt.Errorf("ent: invalid field %q for query", f)}
+		}
+	}
+	if _q.path != nil {
+		prev, err := _q.path(ctx)
+		if err != nil {
+			return err
+		}
+		_q.sql = prev
+	}
+	return nil
+}
+
+func (_q *GroupQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*Group, error) {
+	var (
+		nodes       = []*Group{}
+		_spec       = _q.querySpec()
+		loadedTypes = [2]bool{
+			_q.withUsers != nil,
+			_q.withTodos != nil,
+		}
+	)
+	_spec.ScanValues = func(columns []string) ([]any, error) {
+		return (*Group).scanValues(nil, columns)
+	}
+	_spec.Assign = func(columns []string, values []any) error {
+		node := &Group{config: _q.config}
+		nodes = append(nodes, node)
+		node.Edges.loadedTypes = loadedTypes
+		return node.assignValues(columns, values)
+	}
+	for i := range hooks {
+		hooks[i](ctx, _spec)
+	}
+	if err := sqlgraph.QueryNodes(ctx, _q.driver, _spec); err != nil {
+		return nil, err
+	}
+	if len(nodes) == 0 {
+		return nodes, nil
+	}
+	if query := _q.withUsers; query != nil {
+		if err := _q.loadUsers(ctx, query, nodes,
+			func(n *Group) { n.Edges.Users = []*User{} },
+			func(n *Group, e *User) { n.Edges.Users = append(n.Edges.Users, e) }); err != nil {
+			return nil, err
+		}
+	}
+	if query := _q.withTodos; query != nil {
+		if err := _q.loadTodos(ctx, query, nodes,
+			func(n *Group) { n.Edges.Todos = []*Todo{} },
+			func(n *Group, e *Todo) { n.Edges.Todos = append(n.Edges.Todos, e) }); err != nil {
+			return nil, err
+		}
+	}
+	return nodes, nil
+}
+
+func (_q *GroupQuery) loadUsers(ctx context.Context, query *UserQuery, nodes []*Group, init func(*Group), assign func(*Group, *User)) error {
+	edgeIDs := make([]driver.Value, len(nodes))
+	byID := make(map[int]*Group)
+	nids := make(map[int]map[*Group]struct{})
+	for i, node := range nodes {
+		edgeIDs[i] = node.ID
+		byID[node.ID] = node
+		if init != nil {
+			init(node)
+		}
+	}
+	query.Where(func(s *sql.Selector) {
+		joinT := sql.Table(group.UsersTable)
+		s.Join(joinT).On(s.C(user.FieldID), joinT.C(group.UsersPrimaryKey[0]))
+		s.Where(sql.InValues(joinT.C(group.UsersPrimaryKey[1]), edgeIDs...))
+		columns := s.SelectedColumns()
+		s.Select(joinT.C(group.UsersPrimaryKey[1]))
+		s.AppendSelect(columns...)
+		s.SetDistinct(false)
+	})
+	if err := query.prepareQuery(ctx); err != nil {
+		return err
+	}
+	qr := QuerierFunc(func(ctx context.Context, q Query) (Value, error) {
+		return query.sqlAll(ctx, func(_ context.Context, spec *sqlgraph.QuerySpec) {
+			assign := spec.Assign
+			values := spec.ScanValues
+			spec.ScanValues = func(columns []string) ([]any, error) {
+				values, err := values(columns[1:])
+				if err != nil {
+					return nil, err
+				}
+				return append([]any{new(sql.NullInt64)}, values...), nil
+			}
+			spec.Assign = func(columns []string, values []any) error {
+				outValue := int(values[0].(*sql.NullInt64).Int64)
+				inValue := int(values[1].(*sql.NullInt64).Int64)
+				if nids[inValue] == nil {
+					nids[inValue] = map[*Group]struct{}{byID[outValue]: {}}
+					return assign(columns[1:], values[1:])
+				}
+				nids[inValue][byID[outValue]] = struct{}{}
+				return nil
+			}
+		})
+	})
+	neighbors, err := withInterceptors[[]*User](ctx, query, qr, query.inters)
+	if err != nil {
+		return err
+	}
+	for _, n := range neighbors {
+		nodes, ok := nids[n.ID]
+		if !ok {
+			return fmt.Errorf(`unexpected "users" node returned %v`, n.ID)
+		}
+		for kn := range nodes {
+			assign(kn, n)
+		}
+	}
+	return nil
+}
+func (_q *GroupQuery) loadTodos(ctx context.Context, query *TodoQuery, nodes []*Group, init func(*Group), assign func(*Group, *Todo)) error {
+	fks := make([]driver.Value, 0, len(nodes))
+	nodeids := make(map[int]*Group)
+	for i := range nodes {
+		fks = append(fks, nodes[i].ID)
+		nodeids[nodes[i].ID] = nodes[i]
+		if init != nil {
+			init(nodes[i])
+		}
+	}
+	query.withFKs = true
+	query.Where(predicate.Todo(func(s *sql.Selector) {
+		s.Where(sql.InValues(s.C(group.TodosColumn), fks...))
+	}))
+	neighbors, err := query.All(ctx)
+	if err != nil {
+		return err
+	}
+	for _, n := range neighbors {
+		fk := n.todo_group
+		if fk == nil {
+			return fmt.Errorf(`foreign-key "todo_group" is nil for node %v`, n.ID)
+		}
+		node, ok := nodeids[*fk]
+		if !ok {
+			return fmt.Errorf(`unexpected referenced foreign-key "todo_group" returned %v for node %v`, *fk, n.ID)
+		}
+		assign(node, n)
+	}
+	return nil
+}
+
+func (_q *GroupQuery) sqlCount(ctx context.Context) (int, error) {
+	_spec := _q.querySpec()
+	_spec.Node.Columns = _q.ctx.Fields
+	if len(_q.ctx.Fields) > 0 {
+		_spec.Unique = _q.ctx.Unique != nil && *_q.ctx.Unique
+	}
+	return sqlgraph.CountNodes(ctx, _q.driver, _spec)
+}
+
+func (_q *GroupQuery) querySpec() *sqlgraph.QuerySpec {
+	_spec := sqlgraph.NewQuerySpec(group.Table, group.Columns, sqlgraph.NewFieldSpec(group.FieldID, field.TypeInt))
+	_spec.From = _q.sql
+	if unique := _q.ctx.Unique; unique != nil {
+		_spec.Unique = *unique
+	} else if _q.path != nil {
+		_spec.Unique = true
+	}
+	if fields := _q.ctx.Fields; len(fields) > 0 {
+		_spec.Node.Columns = make([]string, 0, len(fields))
+		_spec.Node.Columns = append(_spec.Node.Columns, group.FieldID)
+		for i := range fields {
+			if fields[i] != group.FieldID {
+				_spec.Node.Columns = append(_spec.Node.Columns, fields[i])
+			}
+		}
+	}
+	if ps := _q.predicates; len(ps) > 0 {
+		_spec.Predicate = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	if limit := _q.ctx.Limit; limit != nil {
+		_spec.Limit = *limit
+	}
+	if offset := _q.ctx.Offset; offset != nil {
+		_spec.Offset = *offset
+	}
+	if ps := _q.order; len(ps) > 0 {
+		_spec.Order = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	return _spec
+}
+
+func (_q *GroupQuery) sqlQuery(ctx context.Context) *sql.Selector {
+	builder := sql.Dialect(_q.driver.Dialect())
+	t1 := builder.Table(group.Table)
+	columns := _q.ctx.Fields
+	if len(columns) == 0 {
+		columns = group.Columns
+	}
+	selector := builder.Select(t1.Columns(columns...)...).From(t1)
+	if _q.sql != nil {
+		selector = _q.sql
+		selector.Select(selector.Columns(columns...)...)
+	}
+	if _q.ctx.Unique != nil && *_q.ctx.Unique {
+		selector.Distinct()
+	}
+	for _, p := range _q.predicates {
+		p(selector)
+	}
+	for _, p := range _q.order {
+		p(selector)
+	}
+	if offset := _q.ctx.Offset; offset != nil {
+		// limit is mandatory for offset clause. We start
+		// with default value, and override it below if needed.
+		selector.Offset(*offset).Limit(math.MaxInt32)
+	}
+	if limit := _q.ctx.Limit; limit != nil {
+		selector.Limit(*limit)
+	}
+	return selector
+}
+
+// GroupGroupBy is the group-by builder for Group entities.
+type GroupGroupBy struct {
+	selector
+	build *GroupQuery
+}
+
+// Aggregate adds the given aggregation functions to the group-by query.
+func (_g *GroupGroupBy) Aggregate(fns ...AggregateFunc) *GroupGroupBy {
+	_g.fns = append(_g.fns, fns...)
+	return _g
+}
+
+// Scan applies the selector query and scans the result into the given value.
+func (_g *GroupGroupBy) Scan(ctx context.Context, v any) error {
+	ctx = setContextOp(ctx, _g.build.ctx, ent.OpQueryGroupBy)
+	if err := _g.build.prepareQuery(ctx); err != nil {
+		return err
+	}
+	return scanWithInterceptors[*GroupQuery, *GroupGroupBy](ctx, _g.build, _g, _g.build.inters, v)
+}
+
+func (_g *GroupGroupBy) sqlScan(ctx context.Context, root *GroupQuery, v any) error {
+	selector := root.sqlQuery(ctx).Select()
+	aggregation := make([]string, 0, len(_g.fns))
+	for _, fn := range _g.fns {
+		aggregation = append(aggregation, fn(selector))
+	}
+	if len(selector.SelectedColumns()) == 0 {
+		columns := make([]string, 0, len(*_g.flds)+len(_g.fns))
+		for _, f := range *_g.flds {
+			columns = append(columns, selector.C(f))
+		}
+		columns = append(columns, aggregation...)
+		selector.Select(columns...)
+	}
+	selector.GroupBy(selector.Columns(*_g.flds...)...)
+	if err := selector.Err(); err != nil {
+		return err
+	}
+	rows := &sql.Rows{}
+	query, args := selector.Query()
+	if err := _g.build.driver.Query(ctx, query, args, rows); err != nil {
+		return err
+	}
+	defer rows.Close()
+	return sql.ScanSlice(rows, v)
+}
+
+// GroupSelect is the builder for selecting fields of Group entities.
+type GroupSelect struct {
+	*GroupQuery
+	selector
+}
+
+// Aggregate adds the given aggregation functions to the selector query.
+func (_s *GroupSelect) Aggregate(fns ...AggregateFunc) *GroupSelect {
+	_s.fns = append(_s.fns, fns...)
+	return _s
+}
+
+// Scan applies the selector query and scans the result into the given value.
+func (_s *GroupSelect) Scan(ctx context.Context, v any) error {
+	ctx = setContextOp(ctx, _s.ctx, ent.OpQuerySelect)
+	if err := _s.prepareQuery(ctx); err != nil {
+		return err
+	}
+	return scanWithInterceptors[*GroupQuery, *GroupSelect](ctx, _s.GroupQuery, _s, _s.inters, v)
+}
+
+func (_s *GroupSelect) sqlScan(ctx context.Context, root *GroupQuery, v any) error {
+	selector := root.sqlQuery(ctx)
+	aggregation := make([]string, 0, len(_s.fns))
+	for _, fn := range _s.fns {
+		aggregation = append(aggregation, fn(selector))
+	}
+	switch n := len(*_s.selector.flds); {
+	case n == 0 && len(aggregation) > 0:
+		selector.Select(aggregation...)
+	case n != 0 && len(aggregation) > 0:
+		selector.AppendSelect(aggregation...)
+	}
+	rows := &sql.Rows{}
+	query, args := selector.Query()
+	if err := _s.driver.Query(ctx, query, args, rows); err != nil {
+		return err
+	}
+	defer rows.Close()
+	return sql.ScanSlice(rows, v)
+}

schema/ent/example/ent/group_update.go

@@ -0,0 +1,535 @@
+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"context"
+	"errors"
+	"ersteller-lib/schema/ent/example/ent/group"
+	"ersteller-lib/schema/ent/example/ent/predicate"
+	"ersteller-lib/schema/ent/example/ent/todo"
+	"ersteller-lib/schema/ent/example/ent/user"
+	"fmt"
+
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+	"entgo.io/ent/schema/field"
+)
+
+// GroupUpdate is the builder for updating Group entities.
+type GroupUpdate struct {
+	config
+	hooks    []Hook
+	mutation *GroupMutation
+}
+
+// Where appends a list predicates to the GroupUpdate builder.
+func (_u *GroupUpdate) Where(ps ...predicate.Group) *GroupUpdate {
+	_u.mutation.Where(ps...)
+	return _u
+}
+
+// SetName sets the "name" field.
+func (_u *GroupUpdate) SetName(v string) *GroupUpdate {
+	_u.mutation.SetName(v)
+	return _u
+}
+
+// SetNillableName sets the "name" field if the given value is not nil.
+func (_u *GroupUpdate) SetNillableName(v *string) *GroupUpdate {
+	if v != nil {
+		_u.SetName(*v)
+	}
+	return _u
+}
+
+// AddUserIDs adds the "users" edge to the User entity by IDs.
+func (_u *GroupUpdate) AddUserIDs(ids ...int) *GroupUpdate {
+	_u.mutation.AddUserIDs(ids...)
+	return _u
+}
+
+// AddUsers adds the "users" edges to the User entity.
+func (_u *GroupUpdate) AddUsers(v ...*User) *GroupUpdate {
+	ids := make([]int, len(v))
+	for i := range v {
+		ids[i] = v[i].ID
+	}
+	return _u.AddUserIDs(ids...)
+}
+
+// AddTodoIDs adds the "todos" edge to the Todo entity by IDs.
+func (_u *GroupUpdate) AddTodoIDs(ids ...int) *GroupUpdate {
+	_u.mutation.AddTodoIDs(ids...)
+	return _u
+}
+
+// AddTodos adds the "todos" edges to the Todo entity.
+func (_u *GroupUpdate) AddTodos(v ...*Todo) *GroupUpdate {
+	ids := make([]int, len(v))
+	for i := range v {
+		ids[i] = v[i].ID
+	}
+	return _u.AddTodoIDs(ids...)
+}
+
+// Mutation returns the GroupMutation object of the builder.
+func (_u *GroupUpdate) Mutation() *GroupMutation {
+	return _u.mutation
+}
+
+// ClearUsers clears all "users" edges to the User entity.
+func (_u *GroupUpdate) ClearUsers() *GroupUpdate {
+	_u.mutation.ClearUsers()
+	return _u
+}
+
+// RemoveUserIDs removes the "users" edge to User entities by IDs.
+func (_u *GroupUpdate) RemoveUserIDs(ids ...int) *GroupUpdate {
+	_u.mutation.RemoveUserIDs(ids...)
+	return _u
+}
+
+// RemoveUsers removes "users" edges to User entities.
+func (_u *GroupUpdate) RemoveUsers(v ...*User) *GroupUpdate {
+	ids := make([]int, len(v))
+	for i := range v {
+		ids[i] = v[i].ID
+	}
+	return _u.RemoveUserIDs(ids...)
+}
+
+// ClearTodos clears all "todos" edges to the Todo entity.
+func (_u *GroupUpdate) ClearTodos() *GroupUpdate {
+	_u.mutation.ClearTodos()
+	return _u
+}
+
+// RemoveTodoIDs removes the "todos" edge to Todo entities by IDs.
+func (_u *GroupUpdate) RemoveTodoIDs(ids ...int) *GroupUpdate {
+	_u.mutation.RemoveTodoIDs(ids...)
+	return _u
+}
+
+// RemoveTodos removes "todos" edges to Todo entities.
+func (_u *GroupUpdate) RemoveTodos(v ...*Todo) *GroupUpdate {
+	ids := make([]int, len(v))
+	for i := range v {
+		ids[i] = v[i].ID
+	}
+	return _u.RemoveTodoIDs(ids...)
+}
+
+// Save executes the query and returns the number of nodes affected by the update operation.
+func (_u *GroupUpdate) Save(ctx context.Context) (int, error) {
+	return withHooks(ctx, _u.sqlSave, _u.mutation, _u.hooks)
+}
+
+// SaveX is like Save, but panics if an error occurs.
+func (_u *GroupUpdate) SaveX(ctx context.Context) int {
+	affected, err := _u.Save(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return affected
+}
+
+// Exec executes the query.
+func (_u *GroupUpdate) Exec(ctx context.Context) error {
+	_, err := _u.Save(ctx)
+	return err
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_u *GroupUpdate) ExecX(ctx context.Context) {
+	if err := _u.Exec(ctx); err != nil {
+		panic(err)
+	}
+}
+
+func (_u *GroupUpdate) sqlSave(ctx context.Context) (_node int, err error) {
+	_spec := sqlgraph.NewUpdateSpec(group.Table, group.Columns, sqlgraph.NewFieldSpec(group.FieldID, field.TypeInt))
+	if ps := _u.mutation.predicates; len(ps) > 0 {
+		_spec.Predicate = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	if value, ok := _u.mutation.Name(); ok {
+		_spec.SetField(group.FieldName, field.TypeString, value)
+	}
+	if _u.mutation.UsersCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2M,
+			Inverse: true,
+			Table:   group.UsersTable,
+			Columns: group.UsersPrimaryKey,
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(user.FieldID, field.TypeInt),
+			},
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.RemovedUsersIDs(); len(nodes) > 0 && !_u.mutation.UsersCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2M,
+			Inverse: true,
+			Table:   group.UsersTable,
+			Columns: group.UsersPrimaryKey,
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(user.FieldID, field.TypeInt),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.UsersIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2M,
+			Inverse: true,
+			Table:   group.UsersTable,
+			Columns: group.UsersPrimaryKey,
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(user.FieldID, field.TypeInt),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Add = append(_spec.Edges.Add, edge)
+	}
+	if _u.mutation.TodosCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: true,
+			Table:   group.TodosTable,
+			Columns: []string{group.TodosColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(todo.FieldID, field.TypeInt),
+			},
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.RemovedTodosIDs(); len(nodes) > 0 && !_u.mutation.TodosCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: true,
+			Table:   group.TodosTable,
+			Columns: []string{group.TodosColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(todo.FieldID, field.TypeInt),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.TodosIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: true,
+			Table:   group.TodosTable,
+			Columns: []string{group.TodosColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(todo.FieldID, field.TypeInt),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Add = append(_spec.Edges.Add, edge)
+	}
+	if _node, err = sqlgraph.UpdateNodes(ctx, _u.driver, _spec); err != nil {
+		if _, ok := err.(*sqlgraph.NotFoundError); ok {
+			err = &NotFoundError{group.Label}
+		} else if sqlgraph.IsConstraintError(err) {
+			err = &ConstraintError{msg: err.Error(), wrap: err}
+		}
+		return 0, err
+	}
+	_u.mutation.done = true
+	return _node, nil
+}
+
+// GroupUpdateOne is the builder for updating a single Group entity.
+type GroupUpdateOne struct {
+	config
+	fields   []string
+	hooks    []Hook
+	mutation *GroupMutation
+}
+
+// SetName sets the "name" field.
+func (_u *GroupUpdateOne) SetName(v string) *GroupUpdateOne {
+	_u.mutation.SetName(v)
+	return _u
+}
+
+// SetNillableName sets the "name" field if the given value is not nil.
+func (_u *GroupUpdateOne) SetNillableName(v *string) *GroupUpdateOne {
+	if v != nil {
+		_u.SetName(*v)
+	}
+	return _u
+}
+
+// AddUserIDs adds the "users" edge to the User entity by IDs.
+func (_u *GroupUpdateOne) AddUserIDs(ids ...int) *GroupUpdateOne {
+	_u.mutation.AddUserIDs(ids...)
+	return _u
+}
+
+// AddUsers adds the "users" edges to the User entity.
+func (_u *GroupUpdateOne) AddUsers(v ...*User) *GroupUpdateOne {
+	ids := make([]int, len(v))
+	for i := range v {
+		ids[i] = v[i].ID
+	}
+	return _u.AddUserIDs(ids...)
+}
+
+// AddTodoIDs adds the "todos" edge to the Todo entity by IDs.
+func (_u *GroupUpdateOne) AddTodoIDs(ids ...int) *GroupUpdateOne {
+	_u.mutation.AddTodoIDs(ids...)
+	return _u
+}
+
+// AddTodos adds the "todos" edges to the Todo entity.
+func (_u *GroupUpdateOne) AddTodos(v ...*Todo) *GroupUpdateOne {
+	ids := make([]int, len(v))
+	for i := range v {
+		ids[i] = v[i].ID
+	}
+	return _u.AddTodoIDs(ids...)
+}
+
+// Mutation returns the GroupMutation object of the builder.
+func (_u *GroupUpdateOne) Mutation() *GroupMutation {
+	return _u.mutation
+}
+
+// ClearUsers clears all "users" edges to the User entity.
+func (_u *GroupUpdateOne) ClearUsers() *GroupUpdateOne {
+	_u.mutation.ClearUsers()
+	return _u
+}
+
+// RemoveUserIDs removes the "users" edge to User entities by IDs.
+func (_u *GroupUpdateOne) RemoveUserIDs(ids ...int) *GroupUpdateOne {
+	_u.mutation.RemoveUserIDs(ids...)
+	return _u
+}
+
+// RemoveUsers removes "users" edges to User entities.
+func (_u *GroupUpdateOne) RemoveUsers(v ...*User) *GroupUpdateOne {
+	ids := make([]int, len(v))
+	for i := range v {
+		ids[i] = v[i].ID
+	}
+	return _u.RemoveUserIDs(ids...)
+}
+
+// ClearTodos clears all "todos" edges to the Todo entity.
+func (_u *GroupUpdateOne) ClearTodos() *GroupUpdateOne {
+	_u.mutation.ClearTodos()
+	return _u
+}
+
+// RemoveTodoIDs removes the "todos" edge to Todo entities by IDs.
+func (_u *GroupUpdateOne) RemoveTodoIDs(ids ...int) *GroupUpdateOne {
+	_u.mutation.RemoveTodoIDs(ids...)
+	return _u
+}
+
+// RemoveTodos removes "todos" edges to Todo entities.
+func (_u *GroupUpdateOne) RemoveTodos(v ...*Todo) *GroupUpdateOne {
+	ids := make([]int, len(v))
+	for i := range v {
+		ids[i] = v[i].ID
+	}
+	return _u.RemoveTodoIDs(ids...)
+}
+
+// Where appends a list predicates to the GroupUpdate builder.
+func (_u *GroupUpdateOne) Where(ps ...predicate.Group) *GroupUpdateOne {
+	_u.mutation.Where(ps...)
+	return _u
+}
+
+// Select allows selecting one or more fields (columns) of the returned entity.
+// The default is selecting all fields defined in the entity schema.
+func (_u *GroupUpdateOne) Select(field string, fields ...string) *GroupUpdateOne {
+	_u.fields = append([]string{field}, fields...)
+	return _u
+}
+
+// Save executes the query and returns the updated Group entity.
+func (_u *GroupUpdateOne) Save(ctx context.Context) (*Group, error) {
+	return withHooks(ctx, _u.sqlSave, _u.mutation, _u.hooks)
+}
+
+// SaveX is like Save, but panics if an error occurs.
+func (_u *GroupUpdateOne) SaveX(ctx context.Context) *Group {
+	node, err := _u.Save(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return node
+}
+
+// Exec executes the query on the entity.
+func (_u *GroupUpdateOne) Exec(ctx context.Context) error {
+	_, err := _u.Save(ctx)
+	return err
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_u *GroupUpdateOne) ExecX(ctx context.Context) {
+	if err := _u.Exec(ctx); err != nil {
+		panic(err)
+	}
+}
+
+func (_u *GroupUpdateOne) sqlSave(ctx context.Context) (_node *Group, err error) {
+	_spec := sqlgraph.NewUpdateSpec(group.Table, group.Columns, sqlgraph.NewFieldSpec(group.FieldID, field.TypeInt))
+	id, ok := _u.mutation.ID()
+	if !ok {
+		return nil, &ValidationError{Name: "id", err: errors.New(`ent: missing "Group.id" for update`)}
+	}
+	_spec.Node.ID.Value = id
+	if fields := _u.fields; len(fields) > 0 {
+		_spec.Node.Columns = make([]string, 0, len(fields))
+		_spec.Node.Columns = append(_spec.Node.Columns, group.FieldID)
+		for _, f := range fields {
+			if !group.ValidColumn(f) {
+				return nil, &ValidationError{Name: f, err: fmt.Errorf("ent: invalid field %q for query", f)}
+			}
+			if f != group.FieldID {
+				_spec.Node.Columns = append(_spec.Node.Columns, f)
+			}
+		}
+	}
+	if ps := _u.mutation.predicates; len(ps) > 0 {
+		_spec.Predicate = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	if value, ok := _u.mutation.Name(); ok {
+		_spec.SetField(group.FieldName, field.TypeString, value)
+	}
+	if _u.mutation.UsersCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2M,
+			Inverse: true,
+			Table:   group.UsersTable,
+			Columns: group.UsersPrimaryKey,
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(user.FieldID, field.TypeInt),
+			},
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.RemovedUsersIDs(); len(nodes) > 0 && !_u.mutation.UsersCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2M,
+			Inverse: true,
+			Table:   group.UsersTable,
+			Columns: group.UsersPrimaryKey,
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(user.FieldID, field.TypeInt),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.UsersIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2M,
+			Inverse: true,
+			Table:   group.UsersTable,
+			Columns: group.UsersPrimaryKey,
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(user.FieldID, field.TypeInt),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Add = append(_spec.Edges.Add, edge)
+	}
+	if _u.mutation.TodosCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: true,
+			Table:   group.TodosTable,
+			Columns: []string{group.TodosColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(todo.FieldID, field.TypeInt),
+			},
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.RemovedTodosIDs(); len(nodes) > 0 && !_u.mutation.TodosCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: true,
+			Table:   group.TodosTable,
+			Columns: []string{group.TodosColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(todo.FieldID, field.TypeInt),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.TodosIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: true,
+			Table:   group.TodosTable,
+			Columns: []string{group.TodosColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(todo.FieldID, field.TypeInt),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Add = append(_spec.Edges.Add, edge)
+	}
+	_node = &Group{config: _u.config}
+	_spec.Assign = _node.assignValues
+	_spec.ScanValues = _node.scanValues
+	if err = sqlgraph.UpdateNode(ctx, _u.driver, _spec); err != nil {
+		if _, ok := err.(*sqlgraph.NotFoundError); ok {
+			err = &NotFoundError{group.Label}
+		} else if sqlgraph.IsConstraintError(err) {
+			err = &ConstraintError{msg: err.Error(), wrap: err}
+		}
+		return nil, err
+	}
+	_u.mutation.done = true
+	return _node, nil
+}

schema/ent/example/ent/hook/hook.go

@@ -8,6 +8,30 @@ import (
 	"fmt"
 )
 
+// The GroupFunc type is an adapter to allow the use of ordinary
+// function as Group mutator.
+type GroupFunc func(context.Context, *ent.GroupMutation) (ent.Value, error)
+
+// Mutate calls f(ctx, m).
+func (f GroupFunc) Mutate(ctx context.Context, m ent.Mutation) (ent.Value, error) {
+	if mv, ok := m.(*ent.GroupMutation); ok {
+		return f(ctx, mv)
+	}
+	return nil, fmt.Errorf("unexpected mutation type %T. expect *ent.GroupMutation", m)
+}
+
+// The TodoFunc type is an adapter to allow the use of ordinary
+// function as Todo mutator.
+type TodoFunc func(context.Context, *ent.TodoMutation) (ent.Value, error)
+
+// Mutate calls f(ctx, m).
+func (f TodoFunc) Mutate(ctx context.Context, m ent.Mutation) (ent.Value, error) {
+	if mv, ok := m.(*ent.TodoMutation); ok {
+		return f(ctx, mv)
+	}
+	return nil, fmt.Errorf("unexpected mutation type %T. expect *ent.TodoMutation", m)
+}
+
 // The UserFunc type is an adapter to allow the use of ordinary
 // function as User mutator.
 type UserFunc func(context.Context, *ent.UserMutation) (ent.Value, error)

schema/ent/example/ent/migrate/schema.go

@@ -8,6 +8,38 @@ import (
 )
 
 var (
+	// GroupsColumns holds the columns for the "groups" table.
+	GroupsColumns = []*schema.Column{
+		{Name: "id", Type: field.TypeInt, Increment: true},
+		{Name: "name", Type: field.TypeString, Default: ""},
+	}
+	// GroupsTable holds the schema information for the "groups" table.
+	GroupsTable = &schema.Table{
+		Name:       "groups",
+		Columns:    GroupsColumns,
+		PrimaryKey: []*schema.Column{GroupsColumns[0]},
+	}
+	// TodosColumns holds the columns for the "todos" table.
+	TodosColumns = []*schema.Column{
+		{Name: "id", Type: field.TypeInt, Increment: true},
+		{Name: "title", Type: field.TypeString, Default: ""},
+		{Name: "completed", Type: field.TypeBool, Default: false},
+		{Name: "todo_group", Type: field.TypeInt, Nullable: true},
+	}
+	// TodosTable holds the schema information for the "todos" table.
+	TodosTable = &schema.Table{
+		Name:       "todos",
+		Columns:    TodosColumns,
+		PrimaryKey: []*schema.Column{TodosColumns[0]},
+		ForeignKeys: []*schema.ForeignKey{
+			{
+				Symbol:     "todos_groups_group",
+				Columns:    []*schema.Column{TodosColumns[3]},
+				RefColumns: []*schema.Column{GroupsColumns[0]},
+				OnDelete:   schema.SetNull,
+			},
+		},
+	}
 	// UsersColumns holds the columns for the "users" table.
 	UsersColumns = []*schema.Column{
 		{Name: "id", Type: field.TypeInt, Increment: true},
@@ -22,11 +54,42 @@ var (
 		Columns:    UsersColumns,
 		PrimaryKey: []*schema.Column{UsersColumns[0]},
 	}
+	// UserGroupColumns holds the columns for the "user_group" table.
+	UserGroupColumns = []*schema.Column{
+		{Name: "user_id", Type: field.TypeInt},
+		{Name: "group_id", Type: field.TypeInt},
+	}
+	// UserGroupTable holds the schema information for the "user_group" table.
+	UserGroupTable = &schema.Table{
+		Name:       "user_group",
+		Columns:    UserGroupColumns,
+		PrimaryKey: []*schema.Column{UserGroupColumns[0], UserGroupColumns[1]},
+		ForeignKeys: []*schema.ForeignKey{
+			{
+				Symbol:     "user_group_user_id",
+				Columns:    []*schema.Column{UserGroupColumns[0]},
+				RefColumns: []*schema.Column{UsersColumns[0]},
+				OnDelete:   schema.Cascade,
+			},
+			{
+				Symbol:     "user_group_group_id",
+				Columns:    []*schema.Column{UserGroupColumns[1]},
+				RefColumns: []*schema.Column{GroupsColumns[0]},
+				OnDelete:   schema.Cascade,
+			},
+		},
+	}
 	// Tables holds all the tables in the schema.
 	Tables = []*schema.Table{
+		GroupsTable,
+		TodosTable,
 		UsersTable,
+		UserGroupTable,
 	}
 )
 
 func init() {
+	TodosTable.ForeignKeys[0].RefTable = GroupsTable
+	UserGroupTable.ForeignKeys[0].RefTable = UsersTable
+	UserGroupTable.ForeignKeys[1].RefTable = GroupsTable
 }

schema/ent/example/ent/pagination_query.go

@@ -10,6 +10,82 @@ import (
 	"entgo.io/ent/dialect/sql"
 )
 
+// PaginateAfterID paginates Group by monotonically increasing "id".
+// It preserves any existing filters/joins applied to the query, fetches up to "limit" items,
+// and returns the next cursor (last ID of this page) and whether a next page exists.
+func (q *GroupQuery) PaginateAfterID(ctx context.Context, afterID, limit int) ([]*Group, int, bool, error) {
+	if limit <= 0 {
+		limit = 20
+	}
+
+	qq := q.Clone().
+		Order(func(s *sql.Selector) {
+			s.OrderBy(s.C("id"))
+		}).
+		Limit(limit + 1) // fetch one extra to detect "has next"
+
+	if afterID > 0 {
+		qq = qq.Where(func(s *sql.Selector) {
+			s.Where(sql.GT(s.C("id"), afterID))
+		})
+	}
+
+	rows, err := qq.All(ctx)
+	if err != nil {
+		return nil, 0, false, err
+	}
+
+	hasNext := len(rows) > limit
+	if hasNext {
+		rows = rows[:limit]
+	}
+
+	next := 0
+	if len(rows) > 0 {
+		next = rows[len(rows)-1].ID
+	}
+
+	return rows, next, hasNext, nil
+}
+
+// PaginateAfterID paginates Todo by monotonically increasing "id".
+// It preserves any existing filters/joins applied to the query, fetches up to "limit" items,
+// and returns the next cursor (last ID of this page) and whether a next page exists.
+func (q *TodoQuery) PaginateAfterID(ctx context.Context, afterID, limit int) ([]*Todo, int, bool, error) {
+	if limit <= 0 {
+		limit = 20
+	}
+
+	qq := q.Clone().
+		Order(func(s *sql.Selector) {
+			s.OrderBy(s.C("id"))
+		}).
+		Limit(limit + 1) // fetch one extra to detect "has next"
+
+	if afterID > 0 {
+		qq = qq.Where(func(s *sql.Selector) {
+			s.Where(sql.GT(s.C("id"), afterID))
+		})
+	}
+
+	rows, err := qq.All(ctx)
+	if err != nil {
+		return nil, 0, false, err
+	}
+
+	hasNext := len(rows) > limit
+	if hasNext {
+		rows = rows[:limit]
+	}
+
+	next := 0
+	if len(rows) > 0 {
+		next = rows[len(rows)-1].ID
+	}
+
+	return rows, next, hasNext, nil
+}
+
 // PaginateAfterID paginates User by monotonically increasing "id".
 // It preserves any existing filters/joins applied to the query, fetches up to "limit" items,
 // and returns the next cursor (last ID of this page) and whether a next page exists.

schema/ent/example/ent/predicate/predicate.go

@@ -6,5 +6,11 @@ import (
 	"entgo.io/ent/dialect/sql"
 )
 
+// Group is the predicate function for group builders.
+type Group func(*sql.Selector)
+
+// Todo is the predicate function for todo builders.
+type Todo func(*sql.Selector)
+
 // User is the predicate function for user builders.
 type User func(*sql.Selector)

schema/ent/example/ent/runtime.go

@@ -3,7 +3,9 @@
 package ent
 
 import (
+	"ersteller-lib/schema/ent/example/ent/group"
 	"ersteller-lib/schema/ent/example/ent/schema"
+	"ersteller-lib/schema/ent/example/ent/todo"
 	"ersteller-lib/schema/ent/example/ent/user"
 	"time"
 )
@@ -12,6 +14,22 @@ import (
 // (default values, validators, hooks and policies) and stitches it
 // to their package variables.
 func init() {
+	groupFields := schema.Group{}.Fields()
+	_ = groupFields
+	// groupDescName is the schema descriptor for name field.
+	groupDescName := groupFields[0].Descriptor()
+	// group.DefaultName holds the default value on creation for the name field.
+	group.DefaultName = groupDescName.Default.(string)
+	todoFields := schema.Todo{}.Fields()
+	_ = todoFields
+	// todoDescTitle is the schema descriptor for title field.
+	todoDescTitle := todoFields[0].Descriptor()
+	// todo.DefaultTitle holds the default value on creation for the title field.
+	todo.DefaultTitle = todoDescTitle.Default.(string)
+	// todoDescCompleted is the schema descriptor for completed field.
+	todoDescCompleted := todoFields[1].Descriptor()
+	// todo.DefaultCompleted holds the default value on creation for the completed field.
+	todo.DefaultCompleted = todoDescCompleted.Default.(bool)
 	userFields := schema.User{}.Fields()
 	_ = userFields
 	// userDescEmail is the schema descriptor for email field.

schema/ent/example/ent/schema/group.go

@@ -0,0 +1,27 @@
+package schema
+
+import (
+	"entgo.io/ent"
+	"entgo.io/ent/schema/edge"
+	"entgo.io/ent/schema/field"
+)
+
+type Group struct {
+	ent.Schema
+}
+
+func (Group) Fields() []ent.Field {
+	return []ent.Field{
+		field.String("name").Default(""),
+	}
+}
+
+// Add edges to define relationships
+func (Group) Edges() []ent.Edge {
+	return []ent.Edge{
+		// Back-reference to users that belong to this group
+		edge.From("users", User.Type).Ref("group"),
+		// Back-reference to todos that belong to this group
+		edge.From("todos", Todo.Type).Ref("group"),
+	}
+}

schema/ent/example/ent/schema/todo.go

@@ -0,0 +1,24 @@
+package schema
+
+import (
+	"entgo.io/ent"
+	"entgo.io/ent/schema/edge"
+	"entgo.io/ent/schema/field"
+)
+
+type Todo struct {
+	ent.Schema
+}
+
+func (Todo) Fields() []ent.Field {
+	return []ent.Field{
+		field.String("title").Default(""),
+		field.Bool("completed").Default(false),
+	}
+}
+
+func (Todo) Edges() []ent.Edge {
+	return []ent.Edge{
+		edge.To("group", Group.Type).Unique(),
+	}
+}

schema/ent/example/ent/schema/user.go

@@ -4,6 +4,7 @@ import (
 	"time"
 
 	"entgo.io/ent"
+	"entgo.io/ent/schema/edge"
 	"entgo.io/ent/schema/field"
 )
 
@@ -23,3 +24,9 @@ func (User) Fields() []ent.Field {
 			UpdateDefault(time.Now),
 	}
 }
+
+func (User) Edges() []ent.Edge {
+	return []ent.Edge{
+		edge.To("group", Group.Type),
+	}
+}

schema/ent/example/ent/todo.go

@@ -0,0 +1,155 @@
+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"ersteller-lib/schema/ent/example/ent/group"
+	"ersteller-lib/schema/ent/example/ent/todo"
+	"fmt"
+	"strings"
+
+	"entgo.io/ent"
+	"entgo.io/ent/dialect/sql"
+)
+
+// Todo is the model entity for the Todo schema.
+type Todo struct {
+	config `json:"-"`
+	// ID of the ent.
+	ID int `json:"id,omitempty"`
+	// Title holds the value of the "title" field.
+	Title string `json:"title,omitempty"`
+	// Completed holds the value of the "completed" field.
+	Completed bool `json:"completed,omitempty"`
+	// Edges holds the relations/edges for other nodes in the graph.
+	// The values are being populated by the TodoQuery when eager-loading is set.
+	Edges        TodoEdges `json:"edges"`
+	todo_group   *int
+	selectValues sql.SelectValues
+}
+
+// TodoEdges holds the relations/edges for other nodes in the graph.
+type TodoEdges struct {
+	// Group holds the value of the group edge.
+	Group *Group `json:"group,omitempty"`
+	// loadedTypes holds the information for reporting if a
+	// type was loaded (or requested) in eager-loading or not.
+	loadedTypes [1]bool
+}
+
+// GroupOrErr returns the Group value or an error if the edge
+// was not loaded in eager-loading, or loaded but was not found.
+func (e TodoEdges) GroupOrErr() (*Group, error) {
+	if e.Group != nil {
+		return e.Group, nil
+	} else if e.loadedTypes[0] {
+		return nil, &NotFoundError{label: group.Label}
+	}
+	return nil, &NotLoadedError{edge: "group"}
+}
+
+// scanValues returns the types for scanning values from sql.Rows.
+func (*Todo) scanValues(columns []string) ([]any, error) {
+	values := make([]any, len(columns))
+	for i := range columns {
+		switch columns[i] {
+		case todo.FieldCompleted:
+			values[i] = new(sql.NullBool)
+		case todo.FieldID:
+			values[i] = new(sql.NullInt64)
+		case todo.FieldTitle:
+			values[i] = new(sql.NullString)
+		case todo.ForeignKeys[0]: // todo_group
+			values[i] = new(sql.NullInt64)
+		default:
+			values[i] = new(sql.UnknownType)
+		}
+	}
+	return values, nil
+}
+
+// assignValues assigns the values that were returned from sql.Rows (after scanning)
+// to the Todo fields.
+func (_m *Todo) assignValues(columns []string, values []any) error {
+	if m, n := len(values), len(columns); m < n {
+		return fmt.Errorf("mismatch number of scan values: %d != %d", m, n)
+	}
+	for i := range columns {
+		switch columns[i] {
+		case todo.FieldID:
+			value, ok := values[i].(*sql.NullInt64)
+			if !ok {
+				return fmt.Errorf("unexpected type %T for field id", value)
+			}
+			_m.ID = int(value.Int64)
+		case todo.FieldTitle:
+			if value, ok := values[i].(*sql.NullString); !ok {
+				return fmt.Errorf("unexpected type %T for field title", values[i])
+			} else if value.Valid {
+				_m.Title = value.String
+			}
+		case todo.FieldCompleted:
+			if value, ok := values[i].(*sql.NullBool); !ok {
+				return fmt.Errorf("unexpected type %T for field completed", values[i])
+			} else if value.Valid {
+				_m.Completed = value.Bool
+			}
+		case todo.ForeignKeys[0]:
+			if value, ok := values[i].(*sql.NullInt64); !ok {
+				return fmt.Errorf("unexpected type %T for edge-field todo_group", value)
+			} else if value.Valid {
+				_m.todo_group = new(int)
+				*_m.todo_group = int(value.Int64)
+			}
+		default:
+			_m.selectValues.Set(columns[i], values[i])
+		}
+	}
+	return nil
+}
+
+// Value returns the ent.Value that was dynamically selected and assigned to the Todo.
+// This includes values selected through modifiers, order, etc.
+func (_m *Todo) Value(name string) (ent.Value, error) {
+	return _m.selectValues.Get(name)
+}
+
+// QueryGroup queries the "group" edge of the Todo entity.
+func (_m *Todo) QueryGroup() *GroupQuery {
+	return NewTodoClient(_m.config).QueryGroup(_m)
+}
+
+// Update returns a builder for updating this Todo.
+// Note that you need to call Todo.Unwrap() before calling this method if this Todo
+// was returned from a transaction, and the transaction was committed or rolled back.
+func (_m *Todo) Update() *TodoUpdateOne {
+	return NewTodoClient(_m.config).UpdateOne(_m)
+}
+
+// Unwrap unwraps the Todo entity that was returned from a transaction after it was closed,
+// so that all future queries will be executed through the driver which created the transaction.
+func (_m *Todo) Unwrap() *Todo {
+	_tx, ok := _m.config.driver.(*txDriver)
+	if !ok {
+		panic("ent: Todo is not a transactional entity")
+	}
+	_m.config.driver = _tx.drv
+	return _m
+}
+
+// String implements the fmt.Stringer.
+func (_m *Todo) String() string {
+	var builder strings.Builder
+	builder.WriteString("Todo(")
+	builder.WriteString(fmt.Sprintf("id=%v, ", _m.ID))
+	builder.WriteString("title=")
+	builder.WriteString(_m.Title)
+	builder.WriteString(", ")
+	builder.WriteString("completed=")
+	builder.WriteString(fmt.Sprintf("%v", _m.Completed))
+	builder.WriteByte(')')
+	return builder.String()
+}
+
+// Todos is a parsable slice of Todo.
+type Todos []*Todo

schema/ent/example/ent/todo/todo.go

@@ -0,0 +1,97 @@
+// Code generated by ent, DO NOT EDIT.
+
+package todo
+
+import (
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+)
+
+const (
+	// Label holds the string label denoting the todo type in the database.
+	Label = "todo"
+	// FieldID holds the string denoting the id field in the database.
+	FieldID = "id"
+	// FieldTitle holds the string denoting the title field in the database.
+	FieldTitle = "title"
+	// FieldCompleted holds the string denoting the completed field in the database.
+	FieldCompleted = "completed"
+	// EdgeGroup holds the string denoting the group edge name in mutations.
+	EdgeGroup = "group"
+	// Table holds the table name of the todo in the database.
+	Table = "todos"
+	// GroupTable is the table that holds the group relation/edge.
+	GroupTable = "todos"
+	// GroupInverseTable is the table name for the Group entity.
+	// It exists in this package in order to avoid circular dependency with the "group" package.
+	GroupInverseTable = "groups"
+	// GroupColumn is the table column denoting the group relation/edge.
+	GroupColumn = "todo_group"
+)
+
+// Columns holds all SQL columns for todo fields.
+var Columns = []string{
+	FieldID,
+	FieldTitle,
+	FieldCompleted,
+}
+
+// ForeignKeys holds the SQL foreign-keys that are owned by the "todos"
+// table and are not defined as standalone fields in the schema.
+var ForeignKeys = []string{
+	"todo_group",
+}
+
+// ValidColumn reports if the column name is valid (part of the table columns).
+func ValidColumn(column string) bool {
+	for i := range Columns {
+		if column == Columns[i] {
+			return true
+		}
+	}
+	for i := range ForeignKeys {
+		if column == ForeignKeys[i] {
+			return true
+		}
+	}
+	return false
+}
+
+var (
+	// DefaultTitle holds the default value on creation for the "title" field.
+	DefaultTitle string
+	// DefaultCompleted holds the default value on creation for the "completed" field.
+	DefaultCompleted bool
+)
+
+// OrderOption defines the ordering options for the Todo queries.
+type OrderOption func(*sql.Selector)
+
+// ByID orders the results by the id field.
+func ByID(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldID, opts...).ToFunc()
+}
+
+// ByTitle orders the results by the title field.
+func ByTitle(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldTitle, opts...).ToFunc()
+}
+
+// ByCompleted orders the results by the completed field.
+func ByCompleted(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldCompleted, opts...).ToFunc()
+}
+
+// ByGroupField orders the results by group field.
+func ByGroupField(field string, opts ...sql.OrderTermOption) OrderOption {
+	return func(s *sql.Selector) {
+		sqlgraph.OrderByNeighborTerms(s, newGroupStep(), sql.OrderByField(field, opts...))
+	}
+}
+func newGroupStep() *sqlgraph.Step {
+	return sqlgraph.NewStep(
+		sqlgraph.From(Table, FieldID),
+		sqlgraph.To(GroupInverseTable, FieldID),
+		sqlgraph.Edge(sqlgraph.M2O, false, GroupTable, GroupColumn),
+	)
+}

schema/ent/example/ent/todo/where.go

@@ -0,0 +1,178 @@
+// Code generated by ent, DO NOT EDIT.
+
+package todo
+
+import (
+	"ersteller-lib/schema/ent/example/ent/predicate"
+
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+)
+
+// ID filters vertices based on their ID field.
+func ID(id int) predicate.Todo {
+	return predicate.Todo(sql.FieldEQ(FieldID, id))
+}
+
+// IDEQ applies the EQ predicate on the ID field.
+func IDEQ(id int) predicate.Todo {
+	return predicate.Todo(sql.FieldEQ(FieldID, id))
+}
+
+// IDNEQ applies the NEQ predicate on the ID field.
+func IDNEQ(id int) predicate.Todo {
+	return predicate.Todo(sql.FieldNEQ(FieldID, id))
+}
+
+// IDIn applies the In predicate on the ID field.
+func IDIn(ids ...int) predicate.Todo {
+	return predicate.Todo(sql.FieldIn(FieldID, ids...))
+}
+
+// IDNotIn applies the NotIn predicate on the ID field.
+func IDNotIn(ids ...int) predicate.Todo {
+	return predicate.Todo(sql.FieldNotIn(FieldID, ids...))
+}
+
+// IDGT applies the GT predicate on the ID field.
+func IDGT(id int) predicate.Todo {
+	return predicate.Todo(sql.FieldGT(FieldID, id))
+}
+
+// IDGTE applies the GTE predicate on the ID field.
+func IDGTE(id int) predicate.Todo {
+	return predicate.Todo(sql.FieldGTE(FieldID, id))
+}
+
+// IDLT applies the LT predicate on the ID field.
+func IDLT(id int) predicate.Todo {
+	return predicate.Todo(sql.FieldLT(FieldID, id))
+}
+
+// IDLTE applies the LTE predicate on the ID field.
+func IDLTE(id int) predicate.Todo {
+	return predicate.Todo(sql.FieldLTE(FieldID, id))
+}
+
+// Title applies equality check predicate on the "title" field. It's identical to TitleEQ.
+func Title(v string) predicate.Todo {
+	return predicate.Todo(sql.FieldEQ(FieldTitle, v))
+}
+
+// Completed applies equality check predicate on the "completed" field. It's identical to CompletedEQ.
+func Completed(v bool) predicate.Todo {
+	return predicate.Todo(sql.FieldEQ(FieldCompleted, v))
+}
+
+// TitleEQ applies the EQ predicate on the "title" field.
+func TitleEQ(v string) predicate.Todo {
+	return predicate.Todo(sql.FieldEQ(FieldTitle, v))
+}
+
+// TitleNEQ applies the NEQ predicate on the "title" field.
+func TitleNEQ(v string) predicate.Todo {
+	return predicate.Todo(sql.FieldNEQ(FieldTitle, v))
+}
+
+// TitleIn applies the In predicate on the "title" field.
+func TitleIn(vs ...string) predicate.Todo {
+	return predicate.Todo(sql.FieldIn(FieldTitle, vs...))
+}
+
+// TitleNotIn applies the NotIn predicate on the "title" field.
+func TitleNotIn(vs ...string) predicate.Todo {
+	return predicate.Todo(sql.FieldNotIn(FieldTitle, vs...))
+}
+
+// TitleGT applies the GT predicate on the "title" field.
+func TitleGT(v string) predicate.Todo {
+	return predicate.Todo(sql.FieldGT(FieldTitle, v))
+}
+
+// TitleGTE applies the GTE predicate on the "title" field.
+func TitleGTE(v string) predicate.Todo {
+	return predicate.Todo(sql.FieldGTE(FieldTitle, v))
+}
+
+// TitleLT applies the LT predicate on the "title" field.
+func TitleLT(v string) predicate.Todo {
+	return predicate.Todo(sql.FieldLT(FieldTitle, v))
+}
+
+// TitleLTE applies the LTE predicate on the "title" field.
+func TitleLTE(v string) predicate.Todo {
+	return predicate.Todo(sql.FieldLTE(FieldTitle, v))
+}
+
+// TitleContains applies the Contains predicate on the "title" field.
+func TitleContains(v string) predicate.Todo {
+	return predicate.Todo(sql.FieldContains(FieldTitle, v))
+}
+
+// TitleHasPrefix applies the HasPrefix predicate on the "title" field.
+func TitleHasPrefix(v string) predicate.Todo {
+	return predicate.Todo(sql.FieldHasPrefix(FieldTitle, v))
+}
+
+// TitleHasSuffix applies the HasSuffix predicate on the "title" field.
+func TitleHasSuffix(v string) predicate.Todo {
+	return predicate.Todo(sql.FieldHasSuffix(FieldTitle, v))
+}
+
+// TitleEqualFold applies the EqualFold predicate on the "title" field.
+func TitleEqualFold(v string) predicate.Todo {
+	return predicate.Todo(sql.FieldEqualFold(FieldTitle, v))
+}
+
+// TitleContainsFold applies the ContainsFold predicate on the "title" field.
+func TitleContainsFold(v string) predicate.Todo {
+	return predicate.Todo(sql.FieldContainsFold(FieldTitle, v))
+}
+
+// CompletedEQ applies the EQ predicate on the "completed" field.
+func CompletedEQ(v bool) predicate.Todo {
+	return predicate.Todo(sql.FieldEQ(FieldCompleted, v))
+}
+
+// CompletedNEQ applies the NEQ predicate on the "completed" field.
+func CompletedNEQ(v bool) predicate.Todo {
+	return predicate.Todo(sql.FieldNEQ(FieldCompleted, v))
+}
+
+// HasGroup applies the HasEdge predicate on the "group" edge.
+func HasGroup() predicate.Todo {
+	return predicate.Todo(func(s *sql.Selector) {
+		step := sqlgraph.NewStep(
+			sqlgraph.From(Table, FieldID),
+			sqlgraph.Edge(sqlgraph.M2O, false, GroupTable, GroupColumn),
+		)
+		sqlgraph.HasNeighbors(s, step)
+	})
+}
+
+// HasGroupWith applies the HasEdge predicate on the "group" edge with a given conditions (other predicates).
+func HasGroupWith(preds ...predicate.Group) predicate.Todo {
+	return predicate.Todo(func(s *sql.Selector) {
+		step := newGroupStep()
+		sqlgraph.HasNeighborsWith(s, step, func(s *sql.Selector) {
+			for _, p := range preds {
+				p(s)
+			}
+		})
+	})
+}
+
+// And groups predicates with the AND operator between them.
+func And(predicates ...predicate.Todo) predicate.Todo {
+	return predicate.Todo(sql.AndPredicates(predicates...))
+}
+
+// Or groups predicates with the OR operator between them.
+func Or(predicates ...predicate.Todo) predicate.Todo {
+	return predicate.Todo(sql.OrPredicates(predicates...))
+}
+
+// Not applies the not operator on the given predicate.
+func Not(p predicate.Todo) predicate.Todo {
+	return predicate.Todo(sql.NotPredicates(p))
+}

schema/ent/example/ent/todo_create.go

@@ -0,0 +1,263 @@
+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"context"
+	"errors"
+	"ersteller-lib/schema/ent/example/ent/group"
+	"ersteller-lib/schema/ent/example/ent/todo"
+	"fmt"
+
+	"entgo.io/ent/dialect/sql/sqlgraph"
+	"entgo.io/ent/schema/field"
+)
+
+// TodoCreate is the builder for creating a Todo entity.
+type TodoCreate struct {
+	config
+	mutation *TodoMutation
+	hooks    []Hook
+}
+
+// SetTitle sets the "title" field.
+func (_c *TodoCreate) SetTitle(v string) *TodoCreate {
+	_c.mutation.SetTitle(v)
+	return _c
+}
+
+// SetNillableTitle sets the "title" field if the given value is not nil.
+func (_c *TodoCreate) SetNillableTitle(v *string) *TodoCreate {
+	if v != nil {
+		_c.SetTitle(*v)
+	}
+	return _c
+}
+
+// SetCompleted sets the "completed" field.
+func (_c *TodoCreate) SetCompleted(v bool) *TodoCreate {
+	_c.mutation.SetCompleted(v)
+	return _c
+}
+
+// SetNillableCompleted sets the "completed" field if the given value is not nil.
+func (_c *TodoCreate) SetNillableCompleted(v *bool) *TodoCreate {
+	if v != nil {
+		_c.SetCompleted(*v)
+	}
+	return _c
+}
+
+// SetGroupID sets the "group" edge to the Group entity by ID.
+func (_c *TodoCreate) SetGroupID(id int) *TodoCreate {
+	_c.mutation.SetGroupID(id)
+	return _c
+}
+
+// SetNillableGroupID sets the "group" edge to the Group entity by ID if the given value is not nil.
+func (_c *TodoCreate) SetNillableGroupID(id *int) *TodoCreate {
+	if id != nil {
+		_c = _c.SetGroupID(*id)
+	}
+	return _c
+}
+
+// SetGroup sets the "group" edge to the Group entity.
+func (_c *TodoCreate) SetGroup(v *Group) *TodoCreate {
+	return _c.SetGroupID(v.ID)
+}
+
+// Mutation returns the TodoMutation object of the builder.
+func (_c *TodoCreate) Mutation() *TodoMutation {
+	return _c.mutation
+}
+
+// Save creates the Todo in the database.
+func (_c *TodoCreate) Save(ctx context.Context) (*Todo, error) {
+	_c.defaults()
+	return withHooks(ctx, _c.sqlSave, _c.mutation, _c.hooks)
+}
+
+// SaveX calls Save and panics if Save returns an error.
+func (_c *TodoCreate) SaveX(ctx context.Context) *Todo {
+	v, err := _c.Save(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return v
+}
+
+// Exec executes the query.
+func (_c *TodoCreate) Exec(ctx context.Context) error {
+	_, err := _c.Save(ctx)
+	return err
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_c *TodoCreate) ExecX(ctx context.Context) {
+	if err := _c.Exec(ctx); err != nil {
+		panic(err)
+	}
+}
+
+// defaults sets the default values of the builder before save.
+func (_c *TodoCreate) defaults() {
+	if _, ok := _c.mutation.Title(); !ok {
+		v := todo.DefaultTitle
+		_c.mutation.SetTitle(v)
+	}
+	if _, ok := _c.mutation.Completed(); !ok {
+		v := todo.DefaultCompleted
+		_c.mutation.SetCompleted(v)
+	}
+}
+
+// check runs all checks and user-defined validators on the builder.
+func (_c *TodoCreate) check() error {
+	if _, ok := _c.mutation.Title(); !ok {
+		return &ValidationError{Name: "title", err: errors.New(`ent: missing required field "Todo.title"`)}
+	}
+	if _, ok := _c.mutation.Completed(); !ok {
+		return &ValidationError{Name: "completed", err: errors.New(`ent: missing required field "Todo.completed"`)}
+	}
+	return nil
+}
+
+func (_c *TodoCreate) sqlSave(ctx context.Context) (*Todo, error) {
+	if err := _c.check(); err != nil {
+		return nil, err
+	}
+	_node, _spec := _c.createSpec()
+	if err := sqlgraph.CreateNode(ctx, _c.driver, _spec); err != nil {
+		if sqlgraph.IsConstraintError(err) {
+			err = &ConstraintError{msg: err.Error(), wrap: err}
+		}
+		return nil, err
+	}
+	id := _spec.ID.Value.(int64)
+	_node.ID = int(id)
+	_c.mutation.id = &_node.ID
+	_c.mutation.done = true
+	return _node, nil
+}
+
+func (_c *TodoCreate) createSpec() (*Todo, *sqlgraph.CreateSpec) {
+	var (
+		_node = &Todo{config: _c.config}
+		_spec = sqlgraph.NewCreateSpec(todo.Table, sqlgraph.NewFieldSpec(todo.FieldID, field.TypeInt))
+	)
+	if value, ok := _c.mutation.Title(); ok {
+		_spec.SetField(todo.FieldTitle, field.TypeString, value)
+		_node.Title = value
+	}
+	if value, ok := _c.mutation.Completed(); ok {
+		_spec.SetField(todo.FieldCompleted, field.TypeBool, value)
+		_node.Completed = value
+	}
+	if nodes := _c.mutation.GroupIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: false,
+			Table:   todo.GroupTable,
+			Columns: []string{todo.GroupColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(group.FieldID, field.TypeInt),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_node.todo_group = &nodes[0]
+		_spec.Edges = append(_spec.Edges, edge)
+	}
+	return _node, _spec
+}
+
+// TodoCreateBulk is the builder for creating many Todo entities in bulk.
+type TodoCreateBulk struct {
+	config
+	err      error
+	builders []*TodoCreate
+}
+
+// Save creates the Todo entities in the database.
+func (_c *TodoCreateBulk) Save(ctx context.Context) ([]*Todo, error) {
+	if _c.err != nil {
+		return nil, _c.err
+	}
+	specs := make([]*sqlgraph.CreateSpec, len(_c.builders))
+	nodes := make([]*Todo, len(_c.builders))
+	mutators := make([]Mutator, len(_c.builders))
+	for i := range _c.builders {
+		func(i int, root context.Context) {
+			builder := _c.builders[i]
+			builder.defaults()
+			var mut Mutator = MutateFunc(func(ctx context.Context, m Mutation) (Value, error) {
+				mutation, ok := m.(*TodoMutation)
+				if !ok {
+					return nil, fmt.Errorf("unexpected mutation type %T", m)
+				}
+				if err := builder.check(); err != nil {
+					return nil, err
+				}
+				builder.mutation = mutation
+				var err error
+				nodes[i], specs[i] = builder.createSpec()
+				if i < len(mutators)-1 {
+					_, err = mutators[i+1].Mutate(root, _c.builders[i+1].mutation)
+				} else {
+					spec := &sqlgraph.BatchCreateSpec{Nodes: specs}
+					// Invoke the actual operation on the latest mutation in the chain.
+					if err = sqlgraph.BatchCreate(ctx, _c.driver, spec); err != nil {
+						if sqlgraph.IsConstraintError(err) {
+							err = &ConstraintError{msg: err.Error(), wrap: err}
+						}
+					}
+				}
+				if err != nil {
+					return nil, err
+				}
+				mutation.id = &nodes[i].ID
+				if specs[i].ID.Value != nil {
+					id := specs[i].ID.Value.(int64)
+					nodes[i].ID = int(id)
+				}
+				mutation.done = true
+				return nodes[i], nil
+			})
+			for i := len(builder.hooks) - 1; i >= 0; i-- {
+				mut = builder.hooks[i](mut)
+			}
+			mutators[i] = mut
+		}(i, ctx)
+	}
+	if len(mutators) > 0 {
+		if _, err := mutators[0].Mutate(ctx, _c.builders[0].mutation); err != nil {
+			return nil, err
+		}
+	}
+	return nodes, nil
+}
+
+// SaveX is like Save, but panics if an error occurs.
+func (_c *TodoCreateBulk) SaveX(ctx context.Context) []*Todo {
+	v, err := _c.Save(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return v
+}
+
+// Exec executes the query.
+func (_c *TodoCreateBulk) Exec(ctx context.Context) error {
+	_, err := _c.Save(ctx)
+	return err
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_c *TodoCreateBulk) ExecX(ctx context.Context) {
+	if err := _c.Exec(ctx); err != nil {
+		panic(err)
+	}
+}

schema/ent/example/ent/todo_delete.go

@@ -0,0 +1,88 @@
+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"context"
+	"ersteller-lib/schema/ent/example/ent/predicate"
+	"ersteller-lib/schema/ent/example/ent/todo"
+
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+	"entgo.io/ent/schema/field"
+)
+
+// TodoDelete is the builder for deleting a Todo entity.
+type TodoDelete struct {
+	config
+	hooks    []Hook
+	mutation *TodoMutation
+}
+
+// Where appends a list predicates to the TodoDelete builder.
+func (_d *TodoDelete) Where(ps ...predicate.Todo) *TodoDelete {
+	_d.mutation.Where(ps...)
+	return _d
+}
+
+// Exec executes the deletion query and returns how many vertices were deleted.
+func (_d *TodoDelete) Exec(ctx context.Context) (int, error) {
+	return withHooks(ctx, _d.sqlExec, _d.mutation, _d.hooks)
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_d *TodoDelete) ExecX(ctx context.Context) int {
+	n, err := _d.Exec(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return n
+}
+
+func (_d *TodoDelete) sqlExec(ctx context.Context) (int, error) {
+	_spec := sqlgraph.NewDeleteSpec(todo.Table, sqlgraph.NewFieldSpec(todo.FieldID, field.TypeInt))
+	if ps := _d.mutation.predicates; len(ps) > 0 {
+		_spec.Predicate = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	affected, err := sqlgraph.DeleteNodes(ctx, _d.driver, _spec)
+	if err != nil && sqlgraph.IsConstraintError(err) {
+		err = &ConstraintError{msg: err.Error(), wrap: err}
+	}
+	_d.mutation.done = true
+	return affected, err
+}
+
+// TodoDeleteOne is the builder for deleting a single Todo entity.
+type TodoDeleteOne struct {
+	_d *TodoDelete
+}
+
+// Where appends a list predicates to the TodoDelete builder.
+func (_d *TodoDeleteOne) Where(ps ...predicate.Todo) *TodoDeleteOne {
+	_d._d.mutation.Where(ps...)
+	return _d
+}
+
+// Exec executes the deletion query.
+func (_d *TodoDeleteOne) Exec(ctx context.Context) error {
+	n, err := _d._d.Exec(ctx)
+	switch {
+	case err != nil:
+		return err
+	case n == 0:
+		return &NotFoundError{todo.Label}
+	default:
+		return nil
+	}
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_d *TodoDeleteOne) ExecX(ctx context.Context) {
+	if err := _d.Exec(ctx); err != nil {
+		panic(err)
+	}
+}

schema/ent/example/ent/todo_query.go

@@ -0,0 +1,614 @@
+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"context"
+	"ersteller-lib/schema/ent/example/ent/group"
+	"ersteller-lib/schema/ent/example/ent/predicate"
+	"ersteller-lib/schema/ent/example/ent/todo"
+	"fmt"
+	"math"
+
+	"entgo.io/ent"
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+	"entgo.io/ent/schema/field"
+)
+
+// TodoQuery is the builder for querying Todo entities.
+type TodoQuery struct {
+	config
+	ctx        *QueryContext
+	order      []todo.OrderOption
+	inters     []Interceptor
+	predicates []predicate.Todo
+	withGroup  *GroupQuery
+	withFKs    bool
+	// intermediate query (i.e. traversal path).
+	sql  *sql.Selector
+	path func(context.Context) (*sql.Selector, error)
+}
+
+// Where adds a new predicate for the TodoQuery builder.
+func (_q *TodoQuery) Where(ps ...predicate.Todo) *TodoQuery {
+	_q.predicates = append(_q.predicates, ps...)
+	return _q
+}
+
+// Limit the number of records to be returned by this query.
+func (_q *TodoQuery) Limit(limit int) *TodoQuery {
+	_q.ctx.Limit = &limit
+	return _q
+}
+
+// Offset to start from.
+func (_q *TodoQuery) Offset(offset int) *TodoQuery {
+	_q.ctx.Offset = &offset
+	return _q
+}
+
+// Unique configures the query builder to filter duplicate records on query.
+// By default, unique is set to true, and can be disabled using this method.
+func (_q *TodoQuery) Unique(unique bool) *TodoQuery {
+	_q.ctx.Unique = &unique
+	return _q
+}
+
+// Order specifies how the records should be ordered.
+func (_q *TodoQuery) Order(o ...todo.OrderOption) *TodoQuery {
+	_q.order = append(_q.order, o...)
+	return _q
+}
+
+// QueryGroup chains the current query on the "group" edge.
+func (_q *TodoQuery) QueryGroup() *GroupQuery {
+	query := (&GroupClient{config: _q.config}).Query()
+	query.path = func(ctx context.Context) (fromU *sql.Selector, err error) {
+		if err := _q.prepareQuery(ctx); err != nil {
+			return nil, err
+		}
+		selector := _q.sqlQuery(ctx)
+		if err := selector.Err(); err != nil {
+			return nil, err
+		}
+		step := sqlgraph.NewStep(
+			sqlgraph.From(todo.Table, todo.FieldID, selector),
+			sqlgraph.To(group.Table, group.FieldID),
+			sqlgraph.Edge(sqlgraph.M2O, false, todo.GroupTable, todo.GroupColumn),
+		)
+		fromU = sqlgraph.SetNeighbors(_q.driver.Dialect(), step)
+		return fromU, nil
+	}
+	return query
+}
+
+// First returns the first Todo entity from the query.
+// Returns a *NotFoundError when no Todo was found.
+func (_q *TodoQuery) First(ctx context.Context) (*Todo, error) {
+	nodes, err := _q.Limit(1).All(setContextOp(ctx, _q.ctx, ent.OpQueryFirst))
+	if err != nil {
+		return nil, err
+	}
+	if len(nodes) == 0 {
+		return nil, &NotFoundError{todo.Label}
+	}
+	return nodes[0], nil
+}
+
+// FirstX is like First, but panics if an error occurs.
+func (_q *TodoQuery) FirstX(ctx context.Context) *Todo {
+	node, err := _q.First(ctx)
+	if err != nil && !IsNotFound(err) {
+		panic(err)
+	}
+	return node
+}
+
+// FirstID returns the first Todo ID from the query.
+// Returns a *NotFoundError when no Todo ID was found.
+func (_q *TodoQuery) FirstID(ctx context.Context) (id int, err error) {
+	var ids []int
+	if ids, err = _q.Limit(1).IDs(setContextOp(ctx, _q.ctx, ent.OpQueryFirstID)); err != nil {
+		return
+	}
+	if len(ids) == 0 {
+		err = &NotFoundError{todo.Label}
+		return
+	}
+	return ids[0], nil
+}
+
+// FirstIDX is like FirstID, but panics if an error occurs.
+func (_q *TodoQuery) FirstIDX(ctx context.Context) int {
+	id, err := _q.FirstID(ctx)
+	if err != nil && !IsNotFound(err) {
+		panic(err)
+	}
+	return id
+}
+
+// Only returns a single Todo entity found by the query, ensuring it only returns one.
+// Returns a *NotSingularError when more than one Todo entity is found.
+// Returns a *NotFoundError when no Todo entities are found.
+func (_q *TodoQuery) Only(ctx context.Context) (*Todo, error) {
+	nodes, err := _q.Limit(2).All(setContextOp(ctx, _q.ctx, ent.OpQueryOnly))
+	if err != nil {
+		return nil, err
+	}
+	switch len(nodes) {
+	case 1:
+		return nodes[0], nil
+	case 0:
+		return nil, &NotFoundError{todo.Label}
+	default:
+		return nil, &NotSingularError{todo.Label}
+	}
+}
+
+// OnlyX is like Only, but panics if an error occurs.
+func (_q *TodoQuery) OnlyX(ctx context.Context) *Todo {
+	node, err := _q.Only(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return node
+}
+
+// OnlyID is like Only, but returns the only Todo ID in the query.
+// Returns a *NotSingularError when more than one Todo ID is found.
+// Returns a *NotFoundError when no entities are found.
+func (_q *TodoQuery) OnlyID(ctx context.Context) (id int, err error) {
+	var ids []int
+	if ids, err = _q.Limit(2).IDs(setContextOp(ctx, _q.ctx, ent.OpQueryOnlyID)); err != nil {
+		return
+	}
+	switch len(ids) {
+	case 1:
+		id = ids[0]
+	case 0:
+		err = &NotFoundError{todo.Label}
+	default:
+		err = &NotSingularError{todo.Label}
+	}
+	return
+}
+
+// OnlyIDX is like OnlyID, but panics if an error occurs.
+func (_q *TodoQuery) OnlyIDX(ctx context.Context) int {
+	id, err := _q.OnlyID(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return id
+}
+
+// All executes the query and returns a list of Todos.
+func (_q *TodoQuery) All(ctx context.Context) ([]*Todo, error) {
+	ctx = setContextOp(ctx, _q.ctx, ent.OpQueryAll)
+	if err := _q.prepareQuery(ctx); err != nil {
+		return nil, err
+	}
+	qr := querierAll[[]*Todo, *TodoQuery]()
+	return withInterceptors[[]*Todo](ctx, _q, qr, _q.inters)
+}
+
+// AllX is like All, but panics if an error occurs.
+func (_q *TodoQuery) AllX(ctx context.Context) []*Todo {
+	nodes, err := _q.All(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return nodes
+}
+
+// IDs executes the query and returns a list of Todo IDs.
+func (_q *TodoQuery) IDs(ctx context.Context) (ids []int, err error) {
+	if _q.ctx.Unique == nil && _q.path != nil {
+		_q.Unique(true)
+	}
+	ctx = setContextOp(ctx, _q.ctx, ent.OpQueryIDs)
+	if err = _q.Select(todo.FieldID).Scan(ctx, &ids); err != nil {
+		return nil, err
+	}
+	return ids, nil
+}
+
+// IDsX is like IDs, but panics if an error occurs.
+func (_q *TodoQuery) IDsX(ctx context.Context) []int {
+	ids, err := _q.IDs(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return ids
+}
+
+// Count returns the count of the given query.
+func (_q *TodoQuery) Count(ctx context.Context) (int, error) {
+	ctx = setContextOp(ctx, _q.ctx, ent.OpQueryCount)
+	if err := _q.prepareQuery(ctx); err != nil {
+		return 0, err
+	}
+	return withInterceptors[int](ctx, _q, querierCount[*TodoQuery](), _q.inters)
+}
+
+// CountX is like Count, but panics if an error occurs.
+func (_q *TodoQuery) CountX(ctx context.Context) int {
+	count, err := _q.Count(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return count
+}
+
+// Exist returns true if the query has elements in the graph.
+func (_q *TodoQuery) Exist(ctx context.Context) (bool, error) {
+	ctx = setContextOp(ctx, _q.ctx, ent.OpQueryExist)
+	switch _, err := _q.FirstID(ctx); {
+	case IsNotFound(err):
+		return false, nil
+	case err != nil:
+		return false, fmt.Errorf("ent: check existence: %w", err)
+	default:
+		return true, nil
+	}
+}
+
+// ExistX is like Exist, but panics if an error occurs.
+func (_q *TodoQuery) ExistX(ctx context.Context) bool {
+	exist, err := _q.Exist(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return exist
+}
+
+// Clone returns a duplicate of the TodoQuery builder, including all associated steps. It can be
+// used to prepare common query builders and use them differently after the clone is made.
+func (_q *TodoQuery) Clone() *TodoQuery {
+	if _q == nil {
+		return nil
+	}
+	return &TodoQuery{
+		config:     _q.config,
+		ctx:        _q.ctx.Clone(),
+		order:      append([]todo.OrderOption{}, _q.order...),
+		inters:     append([]Interceptor{}, _q.inters...),
+		predicates: append([]predicate.Todo{}, _q.predicates...),
+		withGroup:  _q.withGroup.Clone(),
+		// clone intermediate query.
+		sql:  _q.sql.Clone(),
+		path: _q.path,
+	}
+}
+
+// WithGroup tells the query-builder to eager-load the nodes that are connected to
+// the "group" edge. The optional arguments are used to configure the query builder of the edge.
+func (_q *TodoQuery) WithGroup(opts ...func(*GroupQuery)) *TodoQuery {
+	query := (&GroupClient{config: _q.config}).Query()
+	for _, opt := range opts {
+		opt(query)
+	}
+	_q.withGroup = query
+	return _q
+}
+
+// GroupBy is used to group vertices by one or more fields/columns.
+// It is often used with aggregate functions, like: count, max, mean, min, sum.
+//
+// Example:
+//
+//	var v []struct {
+//		Title string `json:"title,omitempty"`
+//		Count int `json:"count,omitempty"`
+//	}
+//
+//	client.Todo.Query().
+//		GroupBy(todo.FieldTitle).
+//		Aggregate(ent.Count()).
+//		Scan(ctx, &v)
+func (_q *TodoQuery) GroupBy(field string, fields ...string) *TodoGroupBy {
+	_q.ctx.Fields = append([]string{field}, fields...)
+	grbuild := &TodoGroupBy{build: _q}
+	grbuild.flds = &_q.ctx.Fields
+	grbuild.label = todo.Label
+	grbuild.scan = grbuild.Scan
+	return grbuild
+}
+
+// Select allows the selection one or more fields/columns for the given query,
+// instead of selecting all fields in the entity.
+//
+// Example:
+//
+//	var v []struct {
+//		Title string `json:"title,omitempty"`
+//	}
+//
+//	client.Todo.Query().
+//		Select(todo.FieldTitle).
+//		Scan(ctx, &v)
+func (_q *TodoQuery) Select(fields ...string) *TodoSelect {
+	_q.ctx.Fields = append(_q.ctx.Fields, fields...)
+	sbuild := &TodoSelect{TodoQuery: _q}
+	sbuild.label = todo.Label
+	sbuild.flds, sbuild.scan = &_q.ctx.Fields, sbuild.Scan
+	return sbuild
+}
+
+// Aggregate returns a TodoSelect configured with the given aggregations.
+func (_q *TodoQuery) Aggregate(fns ...AggregateFunc) *TodoSelect {
+	return _q.Select().Aggregate(fns...)
+}
+
+func (_q *TodoQuery) prepareQuery(ctx context.Context) error {
+	for _, inter := range _q.inters {
+		if inter == nil {
+			return fmt.Errorf("ent: uninitialized interceptor (forgotten import ent/runtime?)")
+		}
+		if trv, ok := inter.(Traverser); ok {
+			if err := trv.Traverse(ctx, _q); err != nil {
+				return err
+			}
+		}
+	}
+	for _, f := range _q.ctx.Fields {
+		if !todo.ValidColumn(f) {
+			return &ValidationError{Name: f, err: fmt.Errorf("ent: invalid field %q for query", f)}
+		}
+	}
+	if _q.path != nil {
+		prev, err := _q.path(ctx)
+		if err != nil {
+			return err
+		}
+		_q.sql = prev
+	}
+	return nil
+}
+
+func (_q *TodoQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*Todo, error) {
+	var (
+		nodes       = []*Todo{}
+		withFKs     = _q.withFKs
+		_spec       = _q.querySpec()
+		loadedTypes = [1]bool{
+			_q.withGroup != nil,
+		}
+	)
+	if _q.withGroup != nil {
+		withFKs = true
+	}
+	if withFKs {
+		_spec.Node.Columns = append(_spec.Node.Columns, todo.ForeignKeys...)
+	}
+	_spec.ScanValues = func(columns []string) ([]any, error) {
+		return (*Todo).scanValues(nil, columns)
+	}
+	_spec.Assign = func(columns []string, values []any) error {
+		node := &Todo{config: _q.config}
+		nodes = append(nodes, node)
+		node.Edges.loadedTypes = loadedTypes
+		return node.assignValues(columns, values)
+	}
+	for i := range hooks {
+		hooks[i](ctx, _spec)
+	}
+	if err := sqlgraph.QueryNodes(ctx, _q.driver, _spec); err != nil {
+		return nil, err
+	}
+	if len(nodes) == 0 {
+		return nodes, nil
+	}
+	if query := _q.withGroup; query != nil {
+		if err := _q.loadGroup(ctx, query, nodes, nil,
+			func(n *Todo, e *Group) { n.Edges.Group = e }); err != nil {
+			return nil, err
+		}
+	}
+	return nodes, nil
+}
+
+func (_q *TodoQuery) loadGroup(ctx context.Context, query *GroupQuery, nodes []*Todo, init func(*Todo), assign func(*Todo, *Group)) error {
+	ids := make([]int, 0, len(nodes))
+	nodeids := make(map[int][]*Todo)
+	for i := range nodes {
+		if nodes[i].todo_group == nil {
+			continue
+		}
+		fk := *nodes[i].todo_group
+		if _, ok := nodeids[fk]; !ok {
+			ids = append(ids, fk)
+		}
+		nodeids[fk] = append(nodeids[fk], nodes[i])
+	}
+	if len(ids) == 0 {
+		return nil
+	}
+	query.Where(group.IDIn(ids...))
+	neighbors, err := query.All(ctx)
+	if err != nil {
+		return err
+	}
+	for _, n := range neighbors {
+		nodes, ok := nodeids[n.ID]
+		if !ok {
+			return fmt.Errorf(`unexpected foreign-key "todo_group" returned %v`, n.ID)
+		}
+		for i := range nodes {
+			assign(nodes[i], n)
+		}
+	}
+	return nil
+}
+
+func (_q *TodoQuery) sqlCount(ctx context.Context) (int, error) {
+	_spec := _q.querySpec()
+	_spec.Node.Columns = _q.ctx.Fields
+	if len(_q.ctx.Fields) > 0 {
+		_spec.Unique = _q.ctx.Unique != nil && *_q.ctx.Unique
+	}
+	return sqlgraph.CountNodes(ctx, _q.driver, _spec)
+}
+
+func (_q *TodoQuery) querySpec() *sqlgraph.QuerySpec {
+	_spec := sqlgraph.NewQuerySpec(todo.Table, todo.Columns, sqlgraph.NewFieldSpec(todo.FieldID, field.TypeInt))
+	_spec.From = _q.sql
+	if unique := _q.ctx.Unique; unique != nil {
+		_spec.Unique = *unique
+	} else if _q.path != nil {
+		_spec.Unique = true
+	}
+	if fields := _q.ctx.Fields; len(fields) > 0 {
+		_spec.Node.Columns = make([]string, 0, len(fields))
+		_spec.Node.Columns = append(_spec.Node.Columns, todo.FieldID)
+		for i := range fields {
+			if fields[i] != todo.FieldID {
+				_spec.Node.Columns = append(_spec.Node.Columns, fields[i])
+			}
+		}
+	}
+	if ps := _q.predicates; len(ps) > 0 {
+		_spec.Predicate = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	if limit := _q.ctx.Limit; limit != nil {
+		_spec.Limit = *limit
+	}
+	if offset := _q.ctx.Offset; offset != nil {
+		_spec.Offset = *offset
+	}
+	if ps := _q.order; len(ps) > 0 {
+		_spec.Order = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	return _spec
+}
+
+func (_q *TodoQuery) sqlQuery(ctx context.Context) *sql.Selector {
+	builder := sql.Dialect(_q.driver.Dialect())
+	t1 := builder.Table(todo.Table)
+	columns := _q.ctx.Fields
+	if len(columns) == 0 {
+		columns = todo.Columns
+	}
+	selector := builder.Select(t1.Columns(columns...)...).From(t1)
+	if _q.sql != nil {
+		selector = _q.sql
+		selector.Select(selector.Columns(columns...)...)
+	}
+	if _q.ctx.Unique != nil && *_q.ctx.Unique {
+		selector.Distinct()
+	}
+	for _, p := range _q.predicates {
+		p(selector)
+	}
+	for _, p := range _q.order {
+		p(selector)
+	}
+	if offset := _q.ctx.Offset; offset != nil {
+		// limit is mandatory for offset clause. We start
+		// with default value, and override it below if needed.
+		selector.Offset(*offset).Limit(math.MaxInt32)
+	}
+	if limit := _q.ctx.Limit; limit != nil {
+		selector.Limit(*limit)
+	}
+	return selector
+}
+
+// TodoGroupBy is the group-by builder for Todo entities.
+type TodoGroupBy struct {
+	selector
+	build *TodoQuery
+}
+
+// Aggregate adds the given aggregation functions to the group-by query.
+func (_g *TodoGroupBy) Aggregate(fns ...AggregateFunc) *TodoGroupBy {
+	_g.fns = append(_g.fns, fns...)
+	return _g
+}
+
+// Scan applies the selector query and scans the result into the given value.
+func (_g *TodoGroupBy) Scan(ctx context.Context, v any) error {
+	ctx = setContextOp(ctx, _g.build.ctx, ent.OpQueryGroupBy)
+	if err := _g.build.prepareQuery(ctx); err != nil {
+		return err
+	}
+	return scanWithInterceptors[*TodoQuery, *TodoGroupBy](ctx, _g.build, _g, _g.build.inters, v)
+}
+
+func (_g *TodoGroupBy) sqlScan(ctx context.Context, root *TodoQuery, v any) error {
+	selector := root.sqlQuery(ctx).Select()
+	aggregation := make([]string, 0, len(_g.fns))
+	for _, fn := range _g.fns {
+		aggregation = append(aggregation, fn(selector))
+	}
+	if len(selector.SelectedColumns()) == 0 {
+		columns := make([]string, 0, len(*_g.flds)+len(_g.fns))
+		for _, f := range *_g.flds {
+			columns = append(columns, selector.C(f))
+		}
+		columns = append(columns, aggregation...)
+		selector.Select(columns...)
+	}
+	selector.GroupBy(selector.Columns(*_g.flds...)...)
+	if err := selector.Err(); err != nil {
+		return err
+	}
+	rows := &sql.Rows{}
+	query, args := selector.Query()
+	if err := _g.build.driver.Query(ctx, query, args, rows); err != nil {
+		return err
+	}
+	defer rows.Close()
+	return sql.ScanSlice(rows, v)
+}
+
+// TodoSelect is the builder for selecting fields of Todo entities.
+type TodoSelect struct {
+	*TodoQuery
+	selector
+}
+
+// Aggregate adds the given aggregation functions to the selector query.
+func (_s *TodoSelect) Aggregate(fns ...AggregateFunc) *TodoSelect {
+	_s.fns = append(_s.fns, fns...)
+	return _s
+}
+
+// Scan applies the selector query and scans the result into the given value.
+func (_s *TodoSelect) Scan(ctx context.Context, v any) error {
+	ctx = setContextOp(ctx, _s.ctx, ent.OpQuerySelect)
+	if err := _s.prepareQuery(ctx); err != nil {
+		return err
+	}
+	return scanWithInterceptors[*TodoQuery, *TodoSelect](ctx, _s.TodoQuery, _s, _s.inters, v)
+}
+
+func (_s *TodoSelect) sqlScan(ctx context.Context, root *TodoQuery, v any) error {
+	selector := root.sqlQuery(ctx)
+	aggregation := make([]string, 0, len(_s.fns))
+	for _, fn := range _s.fns {
+		aggregation = append(aggregation, fn(selector))
+	}
+	switch n := len(*_s.selector.flds); {
+	case n == 0 && len(aggregation) > 0:
+		selector.Select(aggregation...)
+	case n != 0 && len(aggregation) > 0:
+		selector.AppendSelect(aggregation...)
+	}
+	rows := &sql.Rows{}
+	query, args := selector.Query()
+	if err := _s.driver.Query(ctx, query, args, rows); err != nil {
+		return err
+	}
+	defer rows.Close()
+	return sql.ScanSlice(rows, v)
+}

schema/ent/example/ent/todo_update.go

@@ -0,0 +1,352 @@
+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"context"
+	"errors"
+	"ersteller-lib/schema/ent/example/ent/group"
+	"ersteller-lib/schema/ent/example/ent/predicate"
+	"ersteller-lib/schema/ent/example/ent/todo"
+	"fmt"
+
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+	"entgo.io/ent/schema/field"
+)
+
+// TodoUpdate is the builder for updating Todo entities.
+type TodoUpdate struct {
+	config
+	hooks    []Hook
+	mutation *TodoMutation
+}
+
+// Where appends a list predicates to the TodoUpdate builder.
+func (_u *TodoUpdate) Where(ps ...predicate.Todo) *TodoUpdate {
+	_u.mutation.Where(ps...)
+	return _u
+}
+
+// SetTitle sets the "title" field.
+func (_u *TodoUpdate) SetTitle(v string) *TodoUpdate {
+	_u.mutation.SetTitle(v)
+	return _u
+}
+
+// SetNillableTitle sets the "title" field if the given value is not nil.
+func (_u *TodoUpdate) SetNillableTitle(v *string) *TodoUpdate {
+	if v != nil {
+		_u.SetTitle(*v)
+	}
+	return _u
+}
+
+// SetCompleted sets the "completed" field.
+func (_u *TodoUpdate) SetCompleted(v bool) *TodoUpdate {
+	_u.mutation.SetCompleted(v)
+	return _u
+}
+
+// SetNillableCompleted sets the "completed" field if the given value is not nil.
+func (_u *TodoUpdate) SetNillableCompleted(v *bool) *TodoUpdate {
+	if v != nil {
+		_u.SetCompleted(*v)
+	}
+	return _u
+}
+
+// SetGroupID sets the "group" edge to the Group entity by ID.
+func (_u *TodoUpdate) SetGroupID(id int) *TodoUpdate {
+	_u.mutation.SetGroupID(id)
+	return _u
+}
+
+// SetNillableGroupID sets the "group" edge to the Group entity by ID if the given value is not nil.
+func (_u *TodoUpdate) SetNillableGroupID(id *int) *TodoUpdate {
+	if id != nil {
+		_u = _u.SetGroupID(*id)
+	}
+	return _u
+}
+
+// SetGroup sets the "group" edge to the Group entity.
+func (_u *TodoUpdate) SetGroup(v *Group) *TodoUpdate {
+	return _u.SetGroupID(v.ID)
+}
+
+// Mutation returns the TodoMutation object of the builder.
+func (_u *TodoUpdate) Mutation() *TodoMutation {
+	return _u.mutation
+}
+
+// ClearGroup clears the "group" edge to the Group entity.
+func (_u *TodoUpdate) ClearGroup() *TodoUpdate {
+	_u.mutation.ClearGroup()
+	return _u
+}
+
+// Save executes the query and returns the number of nodes affected by the update operation.
+func (_u *TodoUpdate) Save(ctx context.Context) (int, error) {
+	return withHooks(ctx, _u.sqlSave, _u.mutation, _u.hooks)
+}
+
+// SaveX is like Save, but panics if an error occurs.
+func (_u *TodoUpdate) SaveX(ctx context.Context) int {
+	affected, err := _u.Save(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return affected
+}
+
+// Exec executes the query.
+func (_u *TodoUpdate) Exec(ctx context.Context) error {
+	_, err := _u.Save(ctx)
+	return err
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_u *TodoUpdate) ExecX(ctx context.Context) {
+	if err := _u.Exec(ctx); err != nil {
+		panic(err)
+	}
+}
+
+func (_u *TodoUpdate) sqlSave(ctx context.Context) (_node int, err error) {
+	_spec := sqlgraph.NewUpdateSpec(todo.Table, todo.Columns, sqlgraph.NewFieldSpec(todo.FieldID, field.TypeInt))
+	if ps := _u.mutation.predicates; len(ps) > 0 {
+		_spec.Predicate = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	if value, ok := _u.mutation.Title(); ok {
+		_spec.SetField(todo.FieldTitle, field.TypeString, value)
+	}
+	if value, ok := _u.mutation.Completed(); ok {
+		_spec.SetField(todo.FieldCompleted, field.TypeBool, value)
+	}
+	if _u.mutation.GroupCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: false,
+			Table:   todo.GroupTable,
+			Columns: []string{todo.GroupColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(group.FieldID, field.TypeInt),
+			},
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.GroupIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: false,
+			Table:   todo.GroupTable,
+			Columns: []string{todo.GroupColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(group.FieldID, field.TypeInt),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Add = append(_spec.Edges.Add, edge)
+	}
+	if _node, err = sqlgraph.UpdateNodes(ctx, _u.driver, _spec); err != nil {
+		if _, ok := err.(*sqlgraph.NotFoundError); ok {
+			err = &NotFoundError{todo.Label}
+		} else if sqlgraph.IsConstraintError(err) {
+			err = &ConstraintError{msg: err.Error(), wrap: err}
+		}
+		return 0, err
+	}
+	_u.mutation.done = true
+	return _node, nil
+}
+
+// TodoUpdateOne is the builder for updating a single Todo entity.
+type TodoUpdateOne struct {
+	config
+	fields   []string
+	hooks    []Hook
+	mutation *TodoMutation
+}
+
+// SetTitle sets the "title" field.
+func (_u *TodoUpdateOne) SetTitle(v string) *TodoUpdateOne {
+	_u.mutation.SetTitle(v)
+	return _u
+}
+
+// SetNillableTitle sets the "title" field if the given value is not nil.
+func (_u *TodoUpdateOne) SetNillableTitle(v *string) *TodoUpdateOne {
+	if v != nil {
+		_u.SetTitle(*v)
+	}
+	return _u
+}
+
+// SetCompleted sets the "completed" field.
+func (_u *TodoUpdateOne) SetCompleted(v bool) *TodoUpdateOne {
+	_u.mutation.SetCompleted(v)
+	return _u
+}
+
+// SetNillableCompleted sets the "completed" field if the given value is not nil.
+func (_u *TodoUpdateOne) SetNillableCompleted(v *bool) *TodoUpdateOne {
+	if v != nil {
+		_u.SetCompleted(*v)
+	}
+	return _u
+}
+
+// SetGroupID sets the "group" edge to the Group entity by ID.
+func (_u *TodoUpdateOne) SetGroupID(id int) *TodoUpdateOne {
+	_u.mutation.SetGroupID(id)
+	return _u
+}
+
+// SetNillableGroupID sets the "group" edge to the Group entity by ID if the given value is not nil.
+func (_u *TodoUpdateOne) SetNillableGroupID(id *int) *TodoUpdateOne {
+	if id != nil {
+		_u = _u.SetGroupID(*id)
+	}
+	return _u
+}
+
+// SetGroup sets the "group" edge to the Group entity.
+func (_u *TodoUpdateOne) SetGroup(v *Group) *TodoUpdateOne {
+	return _u.SetGroupID(v.ID)
+}
+
+// Mutation returns the TodoMutation object of the builder.
+func (_u *TodoUpdateOne) Mutation() *TodoMutation {
+	return _u.mutation
+}
+
+// ClearGroup clears the "group" edge to the Group entity.
+func (_u *TodoUpdateOne) ClearGroup() *TodoUpdateOne {
+	_u.mutation.ClearGroup()
+	return _u
+}
+
+// Where appends a list predicates to the TodoUpdate builder.
+func (_u *TodoUpdateOne) Where(ps ...predicate.Todo) *TodoUpdateOne {
+	_u.mutation.Where(ps...)
+	return _u
+}
+
+// Select allows selecting one or more fields (columns) of the returned entity.
+// The default is selecting all fields defined in the entity schema.
+func (_u *TodoUpdateOne) Select(field string, fields ...string) *TodoUpdateOne {
+	_u.fields = append([]string{field}, fields...)
+	return _u
+}
+
+// Save executes the query and returns the updated Todo entity.
+func (_u *TodoUpdateOne) Save(ctx context.Context) (*Todo, error) {
+	return withHooks(ctx, _u.sqlSave, _u.mutation, _u.hooks)
+}
+
+// SaveX is like Save, but panics if an error occurs.
+func (_u *TodoUpdateOne) SaveX(ctx context.Context) *Todo {
+	node, err := _u.Save(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return node
+}
+
+// Exec executes the query on the entity.
+func (_u *TodoUpdateOne) Exec(ctx context.Context) error {
+	_, err := _u.Save(ctx)
+	return err
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_u *TodoUpdateOne) ExecX(ctx context.Context) {
+	if err := _u.Exec(ctx); err != nil {
+		panic(err)
+	}
+}
+
+func (_u *TodoUpdateOne) sqlSave(ctx context.Context) (_node *Todo, err error) {
+	_spec := sqlgraph.NewUpdateSpec(todo.Table, todo.Columns, sqlgraph.NewFieldSpec(todo.FieldID, field.TypeInt))
+	id, ok := _u.mutation.ID()
+	if !ok {
+		return nil, &ValidationError{Name: "id", err: errors.New(`ent: missing "Todo.id" for update`)}
+	}
+	_spec.Node.ID.Value = id
+	if fields := _u.fields; len(fields) > 0 {
+		_spec.Node.Columns = make([]string, 0, len(fields))
+		_spec.Node.Columns = append(_spec.Node.Columns, todo.FieldID)
+		for _, f := range fields {
+			if !todo.ValidColumn(f) {
+				return nil, &ValidationError{Name: f, err: fmt.Errorf("ent: invalid field %q for query", f)}
+			}
+			if f != todo.FieldID {
+				_spec.Node.Columns = append(_spec.Node.Columns, f)
+			}
+		}
+	}
+	if ps := _u.mutation.predicates; len(ps) > 0 {
+		_spec.Predicate = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	if value, ok := _u.mutation.Title(); ok {
+		_spec.SetField(todo.FieldTitle, field.TypeString, value)
+	}
+	if value, ok := _u.mutation.Completed(); ok {
+		_spec.SetField(todo.FieldCompleted, field.TypeBool, value)
+	}
+	if _u.mutation.GroupCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: false,
+			Table:   todo.GroupTable,
+			Columns: []string{todo.GroupColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(group.FieldID, field.TypeInt),
+			},
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.GroupIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: false,
+			Table:   todo.GroupTable,
+			Columns: []string{todo.GroupColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(group.FieldID, field.TypeInt),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Add = append(_spec.Edges.Add, edge)
+	}
+	_node = &Todo{config: _u.config}
+	_spec.Assign = _node.assignValues
+	_spec.ScanValues = _node.scanValues
+	if err = sqlgraph.UpdateNode(ctx, _u.driver, _spec); err != nil {
+		if _, ok := err.(*sqlgraph.NotFoundError); ok {
+			err = &NotFoundError{todo.Label}
+		} else if sqlgraph.IsConstraintError(err) {
+			err = &ConstraintError{msg: err.Error(), wrap: err}
+		}
+		return nil, err
+	}
+	_u.mutation.done = true
+	return _node, nil
+}

schema/ent/example/ent/tx.go

@@ -12,6 +12,10 @@ import (
 // Tx is a transactional client that is created by calling Client.Tx().
 type Tx struct {
 	config
+	// Group is the client for interacting with the Group builders.
+	Group *GroupClient
+	// Todo is the client for interacting with the Todo builders.
+	Todo *TodoClient
 	// User is the client for interacting with the User builders.
 	User *UserClient
 
@@ -145,6 +149,8 @@ func (tx *Tx) Client() *Client {
 }
 
 func (tx *Tx) init() {
+	tx.Group = NewGroupClient(tx.config)
+	tx.Todo = NewTodoClient(tx.config)
 	tx.User = NewUserClient(tx.config)
 }
 
@@ -155,7 +161,7 @@ func (tx *Tx) init() {
 // of them in order to commit or rollback the transaction.
 //
 // If a closed transaction is embedded in one of the generated entities, and the entity
-// applies a query, for example: User.QueryXXX(), the query will be executed
+// applies a query, for example: Group.QueryXXX(), the query will be executed
 // through the driver which created this transaction.
 //
 // Note that txDriver is not goroutine safe.

schema/ent/example/ent/user.go

@@ -24,10 +24,31 @@ type User struct {
 	// CreatedAt holds the value of the "created_at" field.
 	CreatedAt time.Time `json:"created_at,omitempty"`
 	// UpdatedAt holds the value of the "updated_at" field.
-	UpdatedAt    time.Time `json:"updated_at,omitempty"`
+	UpdatedAt time.Time `json:"updated_at,omitempty"`
+	// Edges holds the relations/edges for other nodes in the graph.
+	// The values are being populated by the UserQuery when eager-loading is set.
+	Edges        UserEdges `json:"edges"`
 	selectValues sql.SelectValues
 }
 
+// UserEdges holds the relations/edges for other nodes in the graph.
+type UserEdges struct {
+	// Group holds the value of the group edge.
+	Group []*Group `json:"group,omitempty"`
+	// loadedTypes holds the information for reporting if a
+	// type was loaded (or requested) in eager-loading or not.
+	loadedTypes [1]bool
+}
+
+// GroupOrErr returns the Group value or an error if the edge
+// was not loaded in eager-loading.
+func (e UserEdges) GroupOrErr() ([]*Group, error) {
+	if e.loadedTypes[0] {
+		return e.Group, nil
+	}
+	return nil, &NotLoadedError{edge: "group"}
+}
+
 // scanValues returns the types for scanning values from sql.Rows.
 func (*User) scanValues(columns []string) ([]any, error) {
 	values := make([]any, len(columns))
@@ -97,6 +118,11 @@ func (_m *User) Value(name string) (ent.Value, error) {
 	return _m.selectValues.Get(name)
 }
 
+// QueryGroup queries the "group" edge of the User entity.
+func (_m *User) QueryGroup() *GroupQuery {
+	return NewUserClient(_m.config).QueryGroup(_m)
+}
+
 // Update returns a builder for updating this User.
 // Note that you need to call User.Unwrap() before calling this method if this User
 // was returned from a transaction, and the transaction was committed or rolled back.

schema/ent/example/ent/user/user.go

@@ -6,6 +6,7 @@ import (
 	"time"
 
 	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
 )
 
 const (
@@ -21,8 +22,15 @@ const (
 	FieldCreatedAt = "created_at"
 	// FieldUpdatedAt holds the string denoting the updated_at field in the database.
 	FieldUpdatedAt = "updated_at"
+	// EdgeGroup holds the string denoting the group edge name in mutations.
+	EdgeGroup = "group"
 	// Table holds the table name of the user in the database.
 	Table = "users"
+	// GroupTable is the table that holds the group relation/edge. The primary key declared below.
+	GroupTable = "user_group"
+	// GroupInverseTable is the table name for the Group entity.
+	// It exists in this package in order to avoid circular dependency with the "group" package.
+	GroupInverseTable = "groups"
 )
 
 // Columns holds all SQL columns for user fields.
@@ -34,6 +42,12 @@ var Columns = []string{
 	FieldUpdatedAt,
 }
 
+var (
+	// GroupPrimaryKey and GroupColumn2 are the table columns denoting the
+	// primary key for the group relation (M2M).
+	GroupPrimaryKey = []string{"user_id", "group_id"}
+)
+
 // ValidColumn reports if the column name is valid (part of the table columns).
 func ValidColumn(column string) bool {
 	for i := range Columns {
@@ -84,3 +98,24 @@ func ByCreatedAt(opts ...sql.OrderTermOption) OrderOption {
 func ByUpdatedAt(opts ...sql.OrderTermOption) OrderOption {
 	return sql.OrderByField(FieldUpdatedAt, opts...).ToFunc()
 }
+
+// ByGroupCount orders the results by group count.
+func ByGroupCount(opts ...sql.OrderTermOption) OrderOption {
+	return func(s *sql.Selector) {
+		sqlgraph.OrderByNeighborsCount(s, newGroupStep(), opts...)
+	}
+}
+
+// ByGroup orders the results by group terms.
+func ByGroup(term sql.OrderTerm, terms ...sql.OrderTerm) OrderOption {
+	return func(s *sql.Selector) {
+		sqlgraph.OrderByNeighborTerms(s, newGroupStep(), append([]sql.OrderTerm{term}, terms...)...)
+	}
+}
+func newGroupStep() *sqlgraph.Step {
+	return sqlgraph.NewStep(
+		sqlgraph.From(Table, FieldID),
+		sqlgraph.To(GroupInverseTable, FieldID),
+		sqlgraph.Edge(sqlgraph.M2M, false, GroupTable, GroupPrimaryKey...),
+	)
+}

schema/ent/example/ent/user/where.go

@@ -7,6 +7,7 @@ import (
 	"time"
 
 	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
 )
 
 // ID filters vertices based on their ID field.
@@ -284,6 +285,29 @@ func UpdatedAtLTE(v time.Time) predicate.User {
 	return predicate.User(sql.FieldLTE(FieldUpdatedAt, v))
 }
 
+// HasGroup applies the HasEdge predicate on the "group" edge.
+func HasGroup() predicate.User {
+	return predicate.User(func(s *sql.Selector) {
+		step := sqlgraph.NewStep(
+			sqlgraph.From(Table, FieldID),
+			sqlgraph.Edge(sqlgraph.M2M, false, GroupTable, GroupPrimaryKey...),
+		)
+		sqlgraph.HasNeighbors(s, step)
+	})
+}
+
+// HasGroupWith applies the HasEdge predicate on the "group" edge with a given conditions (other predicates).
+func HasGroupWith(preds ...predicate.Group) predicate.User {
+	return predicate.User(func(s *sql.Selector) {
+		step := newGroupStep()
+		sqlgraph.HasNeighborsWith(s, step, func(s *sql.Selector) {
+			for _, p := range preds {
+				p(s)
+			}
+		})
+	})
+}
+
 // And groups predicates with the AND operator between them.
 func And(predicates ...predicate.User) predicate.User {
 	return predicate.User(sql.AndPredicates(predicates...))

schema/ent/example/ent/user_create.go

@@ -5,6 +5,7 @@ package ent
 import (
 	"context"
 	"errors"
+	"ersteller-lib/schema/ent/example/ent/group"
 	"ersteller-lib/schema/ent/example/ent/user"
 	"fmt"
 	"time"
@@ -76,6 +77,21 @@ func (_c *UserCreate) SetNillableUpdatedAt(v *time.Time) *UserCreate {
 	return _c
 }
 
+// AddGroupIDs adds the "group" edge to the Group entity by IDs.
+func (_c *UserCreate) AddGroupIDs(ids ...int) *UserCreate {
+	_c.mutation.AddGroupIDs(ids...)
+	return _c
+}
+
+// AddGroup adds the "group" edges to the Group entity.
+func (_c *UserCreate) AddGroup(v ...*Group) *UserCreate {
+	ids := make([]int, len(v))
+	for i := range v {
+		ids[i] = v[i].ID
+	}
+	return _c.AddGroupIDs(ids...)
+}
+
 // Mutation returns the UserMutation object of the builder.
 func (_c *UserCreate) Mutation() *UserMutation {
 	return _c.mutation
@@ -185,6 +201,22 @@ func (_c *UserCreate) createSpec() (*User, *sqlgraph.CreateSpec) {
 		_spec.SetField(user.FieldUpdatedAt, field.TypeTime, value)
 		_node.UpdatedAt = value
 	}
+	if nodes := _c.mutation.GroupIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2M,
+			Inverse: false,
+			Table:   user.GroupTable,
+			Columns: user.GroupPrimaryKey,
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(group.FieldID, field.TypeInt),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges = append(_spec.Edges, edge)
+	}
 	return _node, _spec
 }
 

schema/ent/example/ent/user_query.go

@@ -4,6 +4,8 @@ package ent
 
 import (
 	"context"
+	"database/sql/driver"
+	"ersteller-lib/schema/ent/example/ent/group"
 	"ersteller-lib/schema/ent/example/ent/predicate"
 	"ersteller-lib/schema/ent/example/ent/user"
 	"fmt"
@@ -22,6 +24,7 @@ type UserQuery struct {
 	order      []user.OrderOption
 	inters     []Interceptor
 	predicates []predicate.User
+	withGroup  *GroupQuery
 	// intermediate query (i.e. traversal path).
 	sql  *sql.Selector
 	path func(context.Context) (*sql.Selector, error)
@@ -58,6 +61,28 @@ func (_q *UserQuery) Order(o ...user.OrderOption) *UserQuery {
 	return _q
 }
 
+// QueryGroup chains the current query on the "group" edge.
+func (_q *UserQuery) QueryGroup() *GroupQuery {
+	query := (&GroupClient{config: _q.config}).Query()
+	query.path = func(ctx context.Context) (fromU *sql.Selector, err error) {
+		if err := _q.prepareQuery(ctx); err != nil {
+			return nil, err
+		}
+		selector := _q.sqlQuery(ctx)
+		if err := selector.Err(); err != nil {
+			return nil, err
+		}
+		step := sqlgraph.NewStep(
+			sqlgraph.From(user.Table, user.FieldID, selector),
+			sqlgraph.To(group.Table, group.FieldID),
+			sqlgraph.Edge(sqlgraph.M2M, false, user.GroupTable, user.GroupPrimaryKey...),
+		)
+		fromU = sqlgraph.SetNeighbors(_q.driver.Dialect(), step)
+		return fromU, nil
+	}
+	return query
+}
+
 // First returns the first User entity from the query.
 // Returns a *NotFoundError when no User was found.
 func (_q *UserQuery) First(ctx context.Context) (*User, error) {
@@ -250,12 +275,24 @@ func (_q *UserQuery) Clone() *UserQuery {
 		order:      append([]user.OrderOption{}, _q.order...),
 		inters:     append([]Interceptor{}, _q.inters...),
 		predicates: append([]predicate.User{}, _q.predicates...),
+		withGroup:  _q.withGroup.Clone(),
 		// clone intermediate query.
 		sql:  _q.sql.Clone(),
 		path: _q.path,
 	}
 }
 
+// WithGroup tells the query-builder to eager-load the nodes that are connected to
+// the "group" edge. The optional arguments are used to configure the query builder of the edge.
+func (_q *UserQuery) WithGroup(opts ...func(*GroupQuery)) *UserQuery {
+	query := (&GroupClient{config: _q.config}).Query()
+	for _, opt := range opts {
+		opt(query)
+	}
+	_q.withGroup = query
+	return _q
+}
+
 // GroupBy is used to group vertices by one or more fields/columns.
 // It is often used with aggregate functions, like: count, max, mean, min, sum.
 //
@@ -332,8 +369,11 @@ func (_q *UserQuery) prepareQuery(ctx context.Context) error {
 
 func (_q *UserQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*User, error) {
 	var (
-		nodes = []*User{}
-		_spec = _q.querySpec()
+		nodes       = []*User{}
+		_spec       = _q.querySpec()
+		loadedTypes = [1]bool{
+			_q.withGroup != nil,
+		}
 	)
 	_spec.ScanValues = func(columns []string) ([]any, error) {
 		return (*User).scanValues(nil, columns)
@@ -341,6 +381,7 @@ func (_q *UserQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*User, e
 	_spec.Assign = func(columns []string, values []any) error {
 		node := &User{config: _q.config}
 		nodes = append(nodes, node)
+		node.Edges.loadedTypes = loadedTypes
 		return node.assignValues(columns, values)
 	}
 	for i := range hooks {
@@ -352,9 +393,78 @@ func (_q *UserQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*User, e
 	if len(nodes) == 0 {
 		return nodes, nil
 	}
+	if query := _q.withGroup; query != nil {
+		if err := _q.loadGroup(ctx, query, nodes,
+			func(n *User) { n.Edges.Group = []*Group{} },
+			func(n *User, e *Group) { n.Edges.Group = append(n.Edges.Group, e) }); err != nil {
+			return nil, err
+		}
+	}
 	return nodes, nil
 }
 
+func (_q *UserQuery) loadGroup(ctx context.Context, query *GroupQuery, nodes []*User, init func(*User), assign func(*User, *Group)) error {
+	edgeIDs := make([]driver.Value, len(nodes))
+	byID := make(map[int]*User)
+	nids := make(map[int]map[*User]struct{})
+	for i, node := range nodes {
+		edgeIDs[i] = node.ID
+		byID[node.ID] = node
+		if init != nil {
+			init(node)
+		}
+	}
+	query.Where(func(s *sql.Selector) {
+		joinT := sql.Table(user.GroupTable)
+		s.Join(joinT).On(s.C(group.FieldID), joinT.C(user.GroupPrimaryKey[1]))
+		s.Where(sql.InValues(joinT.C(user.GroupPrimaryKey[0]), edgeIDs...))
+		columns := s.SelectedColumns()
+		s.Select(joinT.C(user.GroupPrimaryKey[0]))
+		s.AppendSelect(columns...)
+		s.SetDistinct(false)
+	})
+	if err := query.prepareQuery(ctx); err != nil {
+		return err
+	}
+	qr := QuerierFunc(func(ctx context.Context, q Query) (Value, error) {
+		return query.sqlAll(ctx, func(_ context.Context, spec *sqlgraph.QuerySpec) {
+			assign := spec.Assign
+			values := spec.ScanValues
+			spec.ScanValues = func(columns []string) ([]any, error) {
+				values, err := values(columns[1:])
+				if err != nil {
+					return nil, err
+				}
+				return append([]any{new(sql.NullInt64)}, values...), nil
+			}
+			spec.Assign = func(columns []string, values []any) error {
+				outValue := int(values[0].(*sql.NullInt64).Int64)
+				inValue := int(values[1].(*sql.NullInt64).Int64)
+				if nids[inValue] == nil {
+					nids[inValue] = map[*User]struct{}{byID[outValue]: {}}
+					return assign(columns[1:], values[1:])
+				}
+				nids[inValue][byID[outValue]] = struct{}{}
+				return nil
+			}
+		})
+	})
+	neighbors, err := withInterceptors[[]*Group](ctx, query, qr, query.inters)
+	if err != nil {
+		return err
+	}
+	for _, n := range neighbors {
+		nodes, ok := nids[n.ID]
+		if !ok {
+			return fmt.Errorf(`unexpected "group" node returned %v`, n.ID)
+		}
+		for kn := range nodes {
+			assign(kn, n)
+		}
+	}
+	return nil
+}
+
 func (_q *UserQuery) sqlCount(ctx context.Context) (int, error) {
 	_spec := _q.querySpec()
 	_spec.Node.Columns = _q.ctx.Fields

schema/ent/example/ent/user_update.go

@@ -5,6 +5,7 @@ package ent
 import (
 	"context"
 	"errors"
+	"ersteller-lib/schema/ent/example/ent/group"
 	"ersteller-lib/schema/ent/example/ent/predicate"
 	"ersteller-lib/schema/ent/example/ent/user"
 	"fmt"
@@ -62,11 +63,47 @@ func (_u *UserUpdate) SetUpdatedAt(v time.Time) *UserUpdate {
 	return _u
 }
 
+// AddGroupIDs adds the "group" edge to the Group entity by IDs.
+func (_u *UserUpdate) AddGroupIDs(ids ...int) *UserUpdate {
+	_u.mutation.AddGroupIDs(ids...)
+	return _u
+}
+
+// AddGroup adds the "group" edges to the Group entity.
+func (_u *UserUpdate) AddGroup(v ...*Group) *UserUpdate {
+	ids := make([]int, len(v))
+	for i := range v {
+		ids[i] = v[i].ID
+	}
+	return _u.AddGroupIDs(ids...)
+}
+
 // Mutation returns the UserMutation object of the builder.
 func (_u *UserUpdate) Mutation() *UserMutation {
 	return _u.mutation
 }
 
+// ClearGroup clears all "group" edges to the Group entity.
+func (_u *UserUpdate) ClearGroup() *UserUpdate {
+	_u.mutation.ClearGroup()
+	return _u
+}
+
+// RemoveGroupIDs removes the "group" edge to Group entities by IDs.
+func (_u *UserUpdate) RemoveGroupIDs(ids ...int) *UserUpdate {
+	_u.mutation.RemoveGroupIDs(ids...)
+	return _u
+}
+
+// RemoveGroup removes "group" edges to Group entities.
+func (_u *UserUpdate) RemoveGroup(v ...*Group) *UserUpdate {
+	ids := make([]int, len(v))
+	for i := range v {
+		ids[i] = v[i].ID
+	}
+	return _u.RemoveGroupIDs(ids...)
+}
+
 // Save executes the query and returns the number of nodes affected by the update operation.
 func (_u *UserUpdate) Save(ctx context.Context) (int, error) {
 	_u.defaults()
@@ -121,6 +158,51 @@ func (_u *UserUpdate) sqlSave(ctx context.Context) (_node int, err error) {
 	if value, ok := _u.mutation.UpdatedAt(); ok {
 		_spec.SetField(user.FieldUpdatedAt, field.TypeTime, value)
 	}
+	if _u.mutation.GroupCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2M,
+			Inverse: false,
+			Table:   user.GroupTable,
+			Columns: user.GroupPrimaryKey,
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(group.FieldID, field.TypeInt),
+			},
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.RemovedGroupIDs(); len(nodes) > 0 && !_u.mutation.GroupCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2M,
+			Inverse: false,
+			Table:   user.GroupTable,
+			Columns: user.GroupPrimaryKey,
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(group.FieldID, field.TypeInt),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.GroupIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2M,
+			Inverse: false,
+			Table:   user.GroupTable,
+			Columns: user.GroupPrimaryKey,
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(group.FieldID, field.TypeInt),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Add = append(_spec.Edges.Add, edge)
+	}
 	if _node, err = sqlgraph.UpdateNodes(ctx, _u.driver, _spec); err != nil {
 		if _, ok := err.(*sqlgraph.NotFoundError); ok {
 			err = &NotFoundError{user.Label}
@@ -175,11 +257,47 @@ func (_u *UserUpdateOne) SetUpdatedAt(v time.Time) *UserUpdateOne {
 	return _u
 }
 
+// AddGroupIDs adds the "group" edge to the Group entity by IDs.
+func (_u *UserUpdateOne) AddGroupIDs(ids ...int) *UserUpdateOne {
+	_u.mutation.AddGroupIDs(ids...)
+	return _u
+}
+
+// AddGroup adds the "group" edges to the Group entity.
+func (_u *UserUpdateOne) AddGroup(v ...*Group) *UserUpdateOne {
+	ids := make([]int, len(v))
+	for i := range v {
+		ids[i] = v[i].ID
+	}
+	return _u.AddGroupIDs(ids...)
+}
+
 // Mutation returns the UserMutation object of the builder.
 func (_u *UserUpdateOne) Mutation() *UserMutation {
 	return _u.mutation
 }
 
+// ClearGroup clears all "group" edges to the Group entity.
+func (_u *UserUpdateOne) ClearGroup() *UserUpdateOne {
+	_u.mutation.ClearGroup()
+	return _u
+}
+
+// RemoveGroupIDs removes the "group" edge to Group entities by IDs.
+func (_u *UserUpdateOne) RemoveGroupIDs(ids ...int) *UserUpdateOne {
+	_u.mutation.RemoveGroupIDs(ids...)
+	return _u
+}
+
+// RemoveGroup removes "group" edges to Group entities.
+func (_u *UserUpdateOne) RemoveGroup(v ...*Group) *UserUpdateOne {
+	ids := make([]int, len(v))
+	for i := range v {
+		ids[i] = v[i].ID
+	}
+	return _u.RemoveGroupIDs(ids...)
+}
+
 // Where appends a list predicates to the UserUpdate builder.
 func (_u *UserUpdateOne) Where(ps ...predicate.User) *UserUpdateOne {
 	_u.mutation.Where(ps...)
@@ -264,6 +382,51 @@ func (_u *UserUpdateOne) sqlSave(ctx context.Context) (_node *User, err error) {
 	if value, ok := _u.mutation.UpdatedAt(); ok {
 		_spec.SetField(user.FieldUpdatedAt, field.TypeTime, value)
 	}
+	if _u.mutation.GroupCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2M,
+			Inverse: false,
+			Table:   user.GroupTable,
+			Columns: user.GroupPrimaryKey,
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(group.FieldID, field.TypeInt),
+			},
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.RemovedGroupIDs(); len(nodes) > 0 && !_u.mutation.GroupCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2M,
+			Inverse: false,
+			Table:   user.GroupTable,
+			Columns: user.GroupPrimaryKey,
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(group.FieldID, field.TypeInt),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.GroupIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2M,
+			Inverse: false,
+			Table:   user.GroupTable,
+			Columns: user.GroupPrimaryKey,
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(group.FieldID, field.TypeInt),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Add = append(_spec.Edges.Add, edge)
+	}
 	_node = &User{config: _u.config}
 	_spec.Assign = _node.assignValues
 	_spec.ScanValues = _node.scanValues

schema/ent/example/start.go

@@ -3,6 +3,10 @@ package main
 import (
 	"context"
 	"ersteller-lib/schema/ent/example/ent"
+	"ersteller-lib/schema/ent/example/ent/group"
+	"ersteller-lib/schema/ent/example/ent/todo"
+	"ersteller-lib/schema/ent/example/ent/user"
+	"fmt"
 	"log"
 	"time"
 
@@ -18,15 +22,27 @@ func main() {
 	}
 	log.Println("client", client)
 	defer client.Close()
+
+	// Add authorization interceptor for Todo queries
+	client.Todo.Intercept(TodoAuthorizationInterceptor())
+
 	ctx, cancel := context.WithTimeout(context.Background(), time.Minute*5)
 	defer cancel()
+
 	if err := client.Schema.Create(ctx); err != nil {
 		log.Fatalf("failed creating schema resources: %v", err)
 	}
+
+	testGroup, err := client.Group.Create().SetName("Test").Save(ctx)
+	if err != nil {
+		log.Fatalf("failed creating group: %w", err)
+	}
 	u, err := client.User.
 		Create().
 		SetEmail("something@gorlug.de").
-		SetPassword("uhoh").Save(ctx)
+		SetPassword("uhoh").
+		AddGroup(testGroup).
+		Save(ctx)
 	if err != nil {
 		log.Fatalf("failed creating user: %w", err)
 	}
@@ -60,4 +76,68 @@ func main() {
 		}
 	}
 
+	todoItem, err := client.Todo.Create().SetTitle("test").
+		SetGroup(testGroup).Save(ctx)
+	if err != nil {
+		log.Fatalf("failed to create todo", err)
+	}
+
+	// Add user ID to context for authorization
+	authorizedCtx := context.WithValue(ctx, UserIDKey, u.ID)
+
+	// This should work - user is in the group
+	retrievedTodo, err := client.Todo.Get(authorizedCtx, todoItem.ID)
+	if err != nil {
+		log.Fatalf("failed getting todo with authorization: %v", err)
+	}
+	log.Println("retrieved todo:", retrievedTodo)
+
+	// This should fail - no user ID in context
+	_, err = client.Todo.Get(ctx, todoItem.ID)
+	if err != nil {
+		log.Println("expected authorization error:", err)
+	}
+
+	secondGroup, err := client.Group.Create().SetName("second").Save(ctx)
+	if err != nil {
+		log.Fatalf("failed creating group: %w", err)
+	}
+	secondUser, err := client.User.Create().SetEmail("abc@def.de").AddGroup(secondGroup).Save(ctx)
+	if err != nil {
+		log.Fatalf("failed creating user: %w", err)
+	}
+
+	// Add user ID to context for authorization
+	secondUserAuthorizedCtx := context.WithValue(ctx, UserIDKey, secondUser.ID)
+	_, err = client.Todo.Get(secondUserAuthorizedCtx, todoItem.ID)
+	if err != nil {
+		log.Println("expected authorization error:", err)
+	}
+}
+
+// UserIDKey is used to store user ID in context
+type contextKey string
+
+const UserIDKey = contextKey("userID")
+
+// TodoAuthorizationInterceptor returns an interceptor that enforces user authorization for todos
+func TodoAuthorizationInterceptor() ent.Interceptor {
+	return ent.InterceptFunc(func(next ent.Querier) ent.Querier {
+		return ent.QuerierFunc(func(ctx context.Context, query ent.Query) (ent.Value, error) {
+			// Get user ID from context
+			userID, ok := ctx.Value(UserIDKey).(int)
+			if !ok {
+				return nil, fmt.Errorf("user ID is required in context for todo operations")
+			}
+
+			// Cast to TodoQuery to add authorization filter
+			if tq, ok := query.(*ent.TodoQuery); ok {
+				// Add predicate to ensure user is in the same group as the todo
+				tq = tq.Where(todo.HasGroupWith(group.HasUsersWith(user.ID(userID))))
+				return next.Query(ctx, tq)
+			}
+
+			return next.Query(ctx, query)
+		})
+	})
 }