fix update

pkg/service/approval.go

@@ -302,15 +302,16 @@ func (a *ApprovalProvider) UpdateSetting(ctx context.Context, in *approval.Setti
 
 	} else {
 		setting.KeyWord = in.KeyWord
-		fmt.Println("1-------", copyUsers)
-		fmt.Println("1-------", copyUsers == nil)
-		fmt.Println("1-------", len(copyUsers))
 		setting.CopyUsers = copyUsers
 		setting.ApprovalUsers = approvalUsers
 		//setting.ApproverID = in.ApproverID
 		//setting.ApproverName = in.ApproverName
 
 		err = model.DB.Where(&model.ApprovalSetting{Domain: in.Domain, KeyWord: in.KeyWord}).Updates(&setting).Error
+
+		if copyUsers == nil { //空数组
+			model.DB.Where(&model.ApprovalSetting{Domain: in.Domain, KeyWord: in.KeyWord}).Update("copy_users", "[]")
+		}
 	}
 
 	if err == nil {