添加报错提示

frontend/views/car/order-add.php

@@ -487,6 +487,8 @@ use common\models\PriceT;
                             $('#seats').val(obj.data.VehicleItems[0].VehicleSeat);
                         }
                     }
+                } else {
+                    parent.layer.msg(obj.msg);
                 }
             }, 'json');
         }