How do I redirect users and show a message?

Question

I want to redirect users with RedirectResponse and display a message, but the message is not displayed.

$response = new RedirectResponse($url);
$response->send();

After little debugging I found that my initial (source) URL is loaded twice, and the messages (added with drupal_set_message()) are removed from the session in drupal_get_messages(). So I have no messages on my target $url.

How can I achieve this?

I'm doing it in hook_field_widget_form_alter().

Answer 1

Set the repeat parameter in drupal_set_message() to TRUE and it will work:

$response = new RedirectResponse($url);
$response->send();
drupal_set_message(t('My message after redirect'), 'status', TRUE);

Answer 2

I would say that the solution, is not to send the response yourself but in your return.

return $response;

Answer 3

I had this same issue, but using an exit to end the script is not a good idea. Drupal has shutdown functions that it runs at the end of a page load which can be important. Instead I just had to return the redirect response directly:

public function buildForm(array $form, FormStateInterface $form_state) {
  $wizard_data = $form_state->getTemporaryValue('wizard');

  if (empty($wizard_data['csv_data'])) {
    drupal_set_message($this->t('Please upload a file first.'), 'error');
    return $this->redirect('my.route')->send();
  }

Answer 4

After some investigation I have found that I should interrupt script right after the response. You should be very careful with this approach, because it can break some important actions.

$response = new RedirectResponse($url->toString());
$response->send();
exit;

Answer 5

Works for me inside Controller callback. Should not use send(), but just return RedirectResponce object.

drupal_set_message(t('Please log in or create new account.'));
$url = Url::fromRoute('user.login');
$response = new RedirectResponse($url->toString());
return $response;

Answer 6

Redirect:

use Drupal\Core\Url;  
use Symfony\Component\HttpFoundation\RedirectResponse;

$url = Url::fromUri('internal:/');  
$response = new RedirectResponse($url->toString());  
$response->send();

Messages using static service:

\Drupal::messenger()->addStatus($message);

Other equivalents:

addMessage()
addError()
addWarning()

References:

RedirectResponse
Url
Drupal::messenger
MessengerInterface

Answer 7

Don't use send() function, just return $response and it works.

$response = new RedirectResponse(\Drupal::url('user.login'));
// $response->send();
return $response;

Answer 8

Recreate the logout functionality. It's just calling user_logout() function.

For this, I create:

A method in SomeController

public function logout() {
  user_logout();
  return $this->redirect('<front>', [], ['query' => ['logout' => 1]]);
}

An event subcriber, subscribe to KernelEvents::REQUEST

$queryLogout = \Drupal::request()->query->get('logout');
if (!empty($queryLogout) && $queryLogout == 1) {
  drupal_set_message("You are logged out");
}

A router subcriber, altering user.logout route's controller

protected function alterRoutes(RouteCollection $collection) {

  // Change controller who handle logout.
  if ($routeLogout = $collection->get('user.logout')) {
    $routeLogout->setDefault('_controller', '\Drupal\my_module\Controller\SomeController::logout');
  }
}

Answer 9

Here is an example using request:

 use Drupal\Core\Url;  

 $url = Url::fromRoute('user.login');
 $request = \Drupal::request();
 $request->query->set('destination', $url->toString());
 \Drupal::messenger()->addStatus($this->t('Please log in or create new account.'));

Here is an example using reidect response:

use Drupal\Core\Url;  
use Symfony\Component\HttpFoundation\RedirectResponse;

$url = Url::fromRoute('user.login');
$response = new RedirectResponse($url->toString());
$response->send();
\Drupal::messenger()->addStatus($this->t('Please log in or create new account.'));