feat: id字段mixin添加immutable；timeMixin分割为两个

core/orm/nent/mixins/id.go

@@ -26,6 +26,7 @@ func (d DistributedIDMixin) Fields() []ent.Field {
 		field.Int64("id").
 			Annotations(entsql.Annotation{Incremental: tea.Bool(false)}).
 			DefaultFunc(d.idFn).
+			Immutable().
 			Comment("Primary Key | 主键"),
 	}
 }

core/orm/nent/mixins/time.go

@@ -9,26 +9,52 @@ import (
 )
 
 // TimeMixin implements the ent.Mixin for sharing
-// time fields with package schemas.
+// all time fields with package schemas.
 type TimeMixin struct {
 	mixin.Schema
 }
 
 func (TimeMixin) Fields() []ent.Field {
+	return append(
+		CreateTimeMixin{}.Fields(),
+		UpdateTimeMixin{}.Fields()...,
+	)
+}
+
+// CreateTimeMixin implements the ent.Mixin for sharing
+// time fields with package schemas.
+type CreateTimeMixin struct {
+	mixin.Schema
+}
+
+// Fields of the create-time mixin.
+func (CreateTimeMixin) Fields() []ent.Field {
 	return []ent.Field{
 		field.Time("created_at").
-            Immutable().
 			Default(time.Now).
+			Immutable().
 			SchemaType(map[string]string{
 				dialect.MySQL: "datetime",
 			}).
-            Comment("创建时间"),
+			Comment("Create Time | 创建时间"),
+	}
+}
+
+// UpdateTimeMixin implements the ent.Mixin for sharing
+// time fields with package schemas.
+type UpdateTimeMixin struct {
+	mixin.Schema
+}
+
+// Fields of the update-time mixin.
+func (UpdateTimeMixin) Fields() []ent.Field {
+	return []ent.Field{
 		field.Time("updated_at").
 			Default(time.Now).
 			UpdateDefault(time.Now).
 			SchemaType(map[string]string{
 				dialect.MySQL: "datetime",
 			}).
-            Comment("更新时间"),
+			Comment("Update Time | 更新时间"),
 	}
 }