Add ent schema example

schema/ent/example/start.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+	"context"
+	"ersteller-lib/schema/ent/example/ent"
+	"log"
+	"time"
+
+	_ "github.com/mattn/go-sqlite3"
+)
+
+func main() {
+	//client, err := ent.Open("sqlite3", "file:ent?mode=memory&cache=shared&_fk=1")
+	client, err := ent.Open("sqlite3", "/tmp/ersteller_ent_example.db?_fk=1")
+	if err != nil {
+		log.Fatalf("failed opening connection to sqlite: %v", err)
+	}
+	log.Println("client", client)
+	defer client.Close()
+	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)
+	}
+	u, err := client.User.
+		Create().
+		SetEmail("something@gorlug.de").
+		SetPassword("uhoh").Save(ctx)
+	if err != nil {
+		log.Fatalf("failed creating user: %w", err)
+	}
+	log.Println("user was created: ", u)
+
+	time.Sleep(time.Second * 1)
+	u, err = client.User.UpdateOneID(u.ID).SetPassword("wtf").Save(ctx)
+	if err != nil {
+		log.Fatalf("failed updating user: %w", err)
+	}
+	log.Println("user was updated", u)
+
+}