/**
  * Creates data provider instance with search query applied
  *
  * @param array $params
  *
  * @return ActiveDataProvider
  */
 public function search($params)
 {
     $query = ClassroomsBusy::find();
     $dataProvider = new ActiveDataProvider(['query' => $query]);
     $query->joinWith('lesson0');
     $query->joinWith('classroom');
     $this->load($params);
     if (!$this->validate()) {
         // uncomment the following line if you do not want to any records when validation fails
         // $query->where('0=1');
         return $dataProvider;
     }
     $query->andFilterWhere(['cb_id' => $this->cb_id, 'day' => $this->day]);
     $query->andFilterWhere(['like', 'lesson_time_name', $this->lesson])->andFilterWhere(['like', 'classrooms_number', $this->id_classroom]);
     return $dataProvider;
 }