diff --git a/auth/group.go b/auth/group.go
index 4bc27e0..bf97cc6 100644
--- a/auth/group.go
+++ b/auth/group.go
@@ -33,17 +33,26 @@ func (grp *Group) BeforeSave(tx *gorm.DB) (err error) {
 	if grp.DisplayName == "" {
 		grp.DisplayName = strings.TrimPrefix(grp.Name, SYS_AUTH_PREFIX)
 	}
-	return BeforeGroupSave(grp, tx)
+	if BeforeGroupSave != nil {
+		err = BeforeGroupSave(grp, tx)
+	}
+	return
 }
 
 var BeforeGroupUpdate func(*Group, *gorm.DB) error = nil
 
 func (grp *Group) BeforeUpdate(tx *gorm.DB) (err error) {
-	return BeforeGroupUpdate(grp, tx)
+	if BeforeGroupUpdate != nil {
+		err = BeforeGroupUpdate(grp, tx)
+	}
+	return
 }
 
 var BeforeGroupDelete func(*Group, *gorm.DB) error = nil
 
 func (grp *Group) BeforeDelete(tx *gorm.DB) (err error) {
-	return BeforeGroupDelete(grp, tx)
+	if BeforeGroupDelete != nil {
+		err = BeforeGroupDelete(grp, tx)
+	}
+	return
 }