laravel 5.2

Question

我为重装数据表的jquery-datatable定义了“ajax”属性 但是当jq-datatable向控制器发送请求时，console.log会显示“500内部服务器错误”

jquery的：

   $(document).ready(function () {
            var table = $('#rules_table').DataTable({
                "ajax" : {
                    'url': "{{route('rules.data')}}",
                    'type': 'POST'
                },
                select: {
                    style: 'single'
                }
            });

            $('#reload').on('click',function () {
                table.ajax.reload(null,false);

            })

        });

路线：

Route::resource('rules','Rules\RulesController');

Route::post('rules/data', [
    'as' => 'rules.data', 'uses' => 'rules\RulesController@data'
]);

规则控制器

 public function index(Request $request)
    {
            $rules = Rules::all();
            return view('rules/index', compact('rules', $rules));

    }

    public function data() //this function is resposible for ajax request 
    {
            $rules = Rules::all();
            return response()->json([$rules]);
    }