refix

dnfs/dnfs.py

@@ -177,6 +177,8 @@ def add_note():
     #    db.session.commit()
 
 
+    if pid != 0:
+
         select_payload = {
             'action': 'select',
             'table': 'Notes',
@@ -188,8 +190,8 @@ def add_note():
         notes = call_db_service(DB_SERVER_URL, select_payload)
 
         # 不存在的父节点
-    #if [] == notes['data']:
+        if [] == notes['data']:
-    #    return jsonify({'error': 'the new node need a parent'}), 400
+            return jsonify({'error': 'the new node need a parent'}), 400
 
 
     # 内容审查