Add copying task task label relations

pkg/models/list_duplicate.go

@@ -122,7 +122,21 @@ func (ld *ListDuplicate) Create(a web.Auth) (err error) {
 		_ = attachment.File.File.Close()
 	}
 
-	//	* Label Tasks (not the labels)
+	// Copy label tasks (not the labels)
+	labelTasks := []*LabelTask{}
+	err = x.In("task_id", oldTaskIDs).Find(&labelTasks)
+	if err != nil {
+		return
+	}
+
+	for _, lt := range labelTasks {
+		lt.ID = 0
+		lt.TaskID = taskMap[lt.TaskID]
+		if _, err := x.Insert(lt); err != nil {
+			return err
+		}
+	}
+
 	//	* assignees
 	//	* comments
 	//	* relations in that list