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;
}