refactor schema edges

backend/internal/data/ent/schema/user.go

@@ -5,6 +5,8 @@ import (
 	"entgo.io/ent/dialect/entsql"
 	"entgo.io/ent/schema/edge"
 	"entgo.io/ent/schema/field"
+	"entgo.io/ent/schema/mixin"
+	"github.com/google/uuid"
 	"github.com/hay-kot/homebox/backend/internal/data/ent/schema/mixins"
 )
 
@@ -59,3 +61,35 @@ func (User) Edges() []ent.Edge {
 			}),
 	}
 }
+
+// UserMixin when embedded in an ent.Schema, adds a reference to
+// the Group entity.
+type UserMixin struct {
+	ref   string
+	field string
+	mixin.Schema
+}
+
+func (g UserMixin) Fields() []ent.Field {
+	if g.field != "" {
+		return []ent.Field{
+			field.UUID(g.field, uuid.UUID{}),
+		}
+	}
+
+	return nil
+
+}
+
+func (g UserMixin) Edges() []ent.Edge {
+	edge := edge.From("user", User.Type).
+		Ref(g.ref).
+		Unique().
+		Required()
+
+	if g.field != "" {
+		edge = edge.Field(g.field)
+	}
+
+	return []ent.Edge{edge}
+}