/**
* Lists all Post models.
* @return mixed
*/
public function actionIndex()
{
//参数过滤
$params = Yii::$app->request->queryParams;
$model = new Post();
$params = $model->filterParam($params, 'PostSearch');
$searchModel = new PostSearch();
$dataProvider = $searchModel->search($params);
//倒序排列
$dataProvider->query->orderBy('created_at DESC');
return $this->render('index', ['searchModel' => $searchModel, 'dataProvider' => $dataProvider]);
}