/** * Creates data provider instance with search query applied * @return ActiveDataProvider */ public function search($params) { $query = City::find()->joinWith(['country']); $dataProvider = new ActiveDataProvider(['query' => $query]); if (!($this->load($params) && $this->validate())) { return $dataProvider; } $query->andFilterWhere(['id' => $this->id, 'country_id' => $this->country_id]); $query->andFilterWhere(['like', City::tableName() . '.title', $this->title])->andFilterWhere(['like', Country::tableName() . '.title', $this->country]); return $dataProvider; }