/** * Creates data provider instance with search query applied * * @param array $params * * @return ActiveDataProvider */ public function search($params) { $query = Employee::find()->joinWith(['department', 'chief' => function (Query $query) { $query->from(Employee::tableName() . ' chief'); }]); // add conditions that should always apply here $dataProvider = new ActiveDataProvider(['query' => $query]); $dataProvider->sort->attributes['department.name'] = ['asc' => ['department.name' => SORT_ASC], 'desc' => ['department.name' => SORT_DESC]]; $dataProvider->sort->attributes['chief.Name'] = ['asc' => ['chief.Name' => SORT_ASC], 'desc' => ['chief.Name' => SORT_DESC]]; $this->load($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; } // grid filtering conditions $query->andFilterWhere(['id' => $this->id, 'Salary' => $this->Salary]); $query->andFilterWhere(['like', 'Name', $this->Name]); $query->andFilterWhere(['like', 'department.name', $this->getAttribute('department.name')]); $query->andFilterWhere(['like', 'chief.Name', $this->getAttribute('chief.Name')]); return $dataProvider; }