/**
  * Creates data provider instance with search query applied
  *
  * @param array $params
  *
  * @return ActiveDataProvider
  */
 public function search($params)
 {
     $query = Exchangeprogram::find();
     $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;
     }
     $query->andFilterWhere(['exchange_program_id' => $this->exchange_program_id, 'university_id' => $this->university_id, 'specialty_id' => $this->specialty_id, 'language_id' => $this->language_id, 'date' => $this->date]);
     $query->andFilterWhere(['like', 'university_name', $this->university_name])->andFilterWhere(['like', 'language_name', $this->language_name])->andFilterWhere(['like', 'country', $this->country])->andFilterWhere(['like', 'specialty_name', $this->specialty_name])->andFilterWhere(['like', 'period', $this->period])->andFilterWhere(['like', 'conditions', $this->conditions])->andFilterWhere(['like', 'images', $this->images]);
     return $dataProvider;
 }
 /**
  * Finds the Exchangeprogram model based on its primary key value.
  * If the model is not found, a 404 HTTP exception will be thrown.
  * @param integer $id
  * @return Exchangeprogram the loaded model
  * @throws NotFoundHttpException if the model cannot be found
  */
 protected function findModel($id)
 {
     if (($model = Exchangeprogram::findOne($id)) !== null) {
         return $model;
     } else {
         throw new NotFoundHttpException('The requested page does not exist.');
     }
 }