protected function grid ()
{return Admin::grid (Post::class, function (Grid $grid) {

// 条件自动筛选
        $grid->model ()->collection (function ($collect){return $collect->where ("hot",">",2);
        });
        $grid->id ('ID')->sortable ();
        $grid->column ('title','标题');
        $grid->tags ()->pluck ('name')->label ();
        $grid->column ('hot','点击率');
    });
}