perf: 优化创建子节点时锁置后

apps/assets/api/tree.py

@@ -39,16 +39,16 @@ class NodeChildrenApi(generics.ListCreateAPIView):
         self.instance = self.get_object()
 
     def perform_create(self, serializer):
+        data = serializer.validated_data
+        _id = data.get("id")
+        value = data.get("value")
+        if value:
+            children = self.instance.get_children()
+            if children.filter(value=value).exists():
+                raise JMSException(_('The same level node name cannot be the same'))
+        else:
+            value = self.instance.get_next_child_preset_name()
         with NodeAddChildrenLock(self.instance):
-            data = serializer.validated_data
-            _id = data.get("id")
-            value = data.get("value")
-            if value:
-                children = self.instance.get_children()
-                if children.filter(value=value).exists():
-                    raise JMSException(_('The same level node name cannot be the same'))
-            else:
-                value = self.instance.get_next_child_preset_name()
             node = self.instance.create_child(value=value, _id=_id)
             # 避免查询 full value
             node._full_value = node.value