Laravel Ajax 提交 404 错误

路由

Route::group(['prefix' => 'ajax', 'namespace' => 'Ajax'], function() {
    Route::post('/mstore/morders', 'SitesController@morders');
});

    public function morders(Request $request)
    {
        return true;
    }

js代码

$.ajax({
                    url : "{{ URL::to('/mstore/morders') }}",
                   type : "post",
                   traditional:true,
                   data:{"strorderid[]":strorderid,"strordernum[]":strordernum,"customname":customname,"customphone":customphone,"customaddress":customaddress},
                   dataType : "JSON",
                    headers: {
                        'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')
                    },
                   success : function() {
                       alert("成功");
                   }
                });

提交或者直接访问http://yueyu-laravel:8888/mstore/morders 都是404错误，一晚上没招到问题，小白求指点，谢谢。