后台编辑字典类型优化

AdminController/DataDictManageController.py

@@ -293,6 +293,9 @@ class DataDictView(View):
                         updated_by=user_id
                     )
 
+                if not items:
+                    return response.json(0)
+
                 # 删除原有子项及多语言
                 old_items = DictItem.objects.filter(category=category)
                 DictItemI18n.objects.filter(item__in=old_items).delete()