Move pagination_query.tmpl and time_mixin.go to starter

starter/ent/schema/pagination_query.tmpl

@@ -0,0 +1,52 @@
+{{ define "pagination_query" }}
+// Code generated by entc template, DO NOT EDIT.
+
+{{/* A template that adds the functionality for running each client <T> in debug mode */}}
+
+{{/* Add the base header for the generated file */}}
+{{ $pkg := base $.Config.Package }}
+{{ template "header" $ }}
+
+{{ range $n := $.Nodes }}
+
+// PaginateAfterID paginates {{ $n.Name }} 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 *{{ $n.Name }}Query) PaginateAfterID(ctx context.Context, afterID, limit int) ([]*{{ $n.Name }}, 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
+}
+
+{{ end }}
+
+{{ end }}