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