From 7bb0124bbec284e02dadd5bbf9f6851a86f1c8f5 Mon Sep 17 00:00:00 2001
From: shufeng2012 <277665039@qq.com>
Date: Fri, 24 Jul 2026 08:54:22 +0800
Subject: [PATCH] =?UTF-8?q?=E6=9C=89=E5=AD=90=E8=8A=82=E7=82=B9=E4=B8=8D?=
 =?UTF-8?q?=E5=8F=AF=E5=88=A0=E9=99=A4?=
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---
 dnfs/dnfs.py | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/dnfs/dnfs.py b/dnfs/dnfs.py
index d922026..9ca9746 100755
--- a/dnfs/dnfs.py
+++ b/dnfs/dnfs.py
@@ -118,12 +118,20 @@ def delete_note():
 
     note_id = data.get('id')
 
-    if not note_id:
+    if note_id:
 
         return jsonify({"error": "Note ID is required"}), 400
 
     with app.app_context():
 
+        notes = Note.query.filter(Note.pid == int(note_id))
+
+        # 有子节点的情况不可删除
+        if not notes:
+
+            return jsonify({'error': 'this node has a child'}), 400
+
+
         note = Note.query.get(note_id)
 
         if note: