laravel-admin 列表页grid带参数和接收参数 去重查询 用法

//指定条件 去重查询
<blockquote> $grid->model()->select('name')->distinct()->orderBy('id','desc');

获取参数

 $grid->state('状态')->display(function () {
            $state = $this->state;
            $certArr = [
                6 => ['text' => '待退款', 'color' => 'danger'],
                7 => ['text' => '退款成功', 'color' => 'success'],
            ];
            return "<span class='label label-" . $certArr[$state]['color'] . "'>" . $certArr[$state]['text'] . "</span>";
        });

      $id = request('id');