backend\models\CategorySearch::search PHP Метод

    public function search($params)
    {
        $query = Category::find();
        $dataProvider = new ActiveDataProvider(['query' => $query, 'sort' => ['defaultOrder' => ['sort' => SORT_ASC]], 'pagination' => ['pageSize' => 20]]);
        // load the seach form data and validate
        if (!($this->load($params) && $this->validate())) {
            return $dataProvider;
        }
        // adjust the query by adding the filters
        $query->andFilterWhere(['like', 'name', $this->name])->andFilterWhere(['like', 'slug', $this->slug]);
        return $dataProvider;
    }

 /**
  * Lists all Category models.
  * @return mixed
  */
 public function actionIndex()
 {
     if (Yii::$app->user->can('admin')) {
         $searchModel = new CategorySearch();
         $dataProvider = $searchModel->search(Yii::$app->request->queryParams);
         return $this->render('index', ['searchModel' => $searchModel, 'dataProvider' => $dataProvider]);
     } else {
         return parent::actionLogin();
     }
 }