代码完善

@@ -271,6 +271,8 @@ class OrderGrab extends Api
                 $v->visible(['id','grab_price','voucher_images','status','createtime','order']);
                 if($v->getRelation('order')){
                     $v->getRelation('order')->visible(['id','market_name','license_plate','parking_fee','deposit','score']);
+                }else{
+                    $v->order = []; 
                 }
             })->toArray();
         $this->success('成功',$data);