joinWith(['project', 'user']); // add conditions that should always apply here $dataProvider = new ActiveDataProvider([ 'query' => $query, ]); $this->load($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, 'project_id' => $this->project_id, 'user_id' => $this->user_id, ]); return $dataProvider; } }