diff --git a/orm.go b/orm.go
index b3c9c1c..d5820ec 100644
--- a/orm.go
+++ b/orm.go
@@ -71,6 +71,7 @@ type Join interface {
 type Model interface {
 	Relation
 	condition.TokenValue
+	IsDuplicated() bool
 	GetCode() string
 	GetPrimaryKey() string
 	GetQueryFieldsStruct(extends ...reflect.StructField) any