gx

@@ -152,6 +152,8 @@ class CategoryLogic extends  BaseLogic
                 $this->param['describe_image'][$k] = $v;
             }
             $this->param['describe_image'] = json_encode($this->param['describe_image']);
+        }else{
+            $this->param['describe_image'] = '';
         }
         return $this->success($param);
     }