gx

@@ -153,7 +153,7 @@ class CategoryLogic extends  BaseLogic
             }
             $this->param['describe_image'] = json_encode($this->param['describe_image']);
         }else{
-            $this->param['describe_image'] = '';
+            $this->param['describe_image'] = json_encode([]);
         }
         return $this->success($param);
     }