snapshot of https://github.com/ent/ent.git (master, 2026-09-15; blobs > 131072B omitted)

examples/version/ent/schema/user.go

@@ -0,0 +1,50 @@
+// Copyright 2019-present Facebook Inc. All rights reserved.
+// This source code is licensed under the Apache 2.0 license found
+// in the LICENSE file in the root directory of this source tree.
+
+package schema
+
+import (
+	"time"
+
+	"entgo.io/ent"
+	"entgo.io/ent/schema/field"
+	"entgo.io/ent/schema/mixin"
+)
+
+// User holds the schema definition for the User entity.
+type User struct {
+	ent.Schema
+}
+
+// Mixin of the User.
+func (User) Mixin() []ent.Mixin {
+	return []ent.Mixin{
+		VersionMixin{},
+	}
+}
+
+// Fields of the User.
+func (User) Fields() []ent.Field {
+	return []ent.Field{
+		field.Enum("status").
+			Values("online", "offline"),
+	}
+}
+
+// VersionMixin provides an optimistic concurrency
+// control mechanism using a "version" field.
+type VersionMixin struct {
+	mixin.Schema
+}
+
+// Fields of the VersionMixin.
+func (VersionMixin) Fields() []ent.Field {
+	return []ent.Field{
+		field.Int64("version").
+			DefaultFunc(func() int64 {
+				return time.Now().UnixNano()
+			}).
+			Comment("Unix time of when the latest update occurred"),
+	}
+}