/**
  * Finds the SurveyHasParticipant model based on its primary key value.
  * If the model is not found, a 404 HTTP exception will be thrown.
  * @param integer $Survey_id
  * @param integer $Participant_id
  * @return SurveyHasParticipant the loaded model
  * @throws NotFoundHttpException if the model cannot be found
  */
 protected function findModel($Survey_id, $Participant_id)
 {
     if (($model = SurveyHasParticipant::findOne(['Survey_id' => $Survey_id, 'Participant_id' => $Participant_id])) !== null) {
         return $model;
     } else {
         throw new NotFoundHttpException('The requested page does not exist.');
     }
 }