public function search($params) { $query = Category::find(); $dataProvider = new ActiveDataProvider(['query' => $query, 'sort' => ['defaultOrder' => ['tree' => SORT_ASC, 'lft' => SORT_ASC]]]); $this->load($params); if (!$this->validate()) { // uncomment the following line if you do not want to return any records when validation fails // $query->where('0=1'); return $dataProvider; } $query->andFilterWhere(['like', 'name', $this->name]); return $dataProvider; }