代码完善

@@ -146,6 +146,8 @@ class Message extends Api
                 // 订单
                 if($v->getRelation('order')){
                     $v->getRelation('order')->visible(['id','market_name','license_plate','parking_fee','deposit']);
+                }else{
+                    $v->order = [];
                 }
                 // 抢单
                 if($v->getRelation('grab')){
@@ -156,7 +158,11 @@ class Message extends Api
                     // 抢单用户信息
                     if($v->getRelation('grab')->getRelation('user')){
                         $v->getRelation('grab')->getRelation('user')->visible(['id','nickname']);
+                    }else{
+                        $v->getRelation('grab')->user = [];
                     }
+                }else{
+                    $v->grab = [];
                 }
             })->toArray();
         $this->success('成功',$data);