/**
  * Finds the Payment model based on its primary key value.
  * If the model is not found, a 404 HTTP exception will be thrown.
  * @param integer $id
  * @return Payment the loaded model
  * @throws HttpException if the model cannot be found
  */
 protected function findModel($id)
 {
     if (($model = Payment::findOne($id)) !== null) {
         return $model;
     } else {
         throw new HttpException(404, 'The requested page does not exist.');
     }
 }
 public function actionUpdatePayment($paymentId)
 {
     $payment = Payment::findOne($paymentId);
     if (!isset($payment)) {
         throw new HttpException(404, 'The requested page does not exist.');
     }
     if ($payment->load(Yii::$app->request->post()) && $payment->save()) {
         Yii::$app->session->setFlash('info', "Payment updated successfully");
         return $this->redirect(['default/list-payments']);
     }
     return $this->render('update-payment', compact('payment'));
 }