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