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After my user is submitting a form, I want to logged him out, then redirect to the front page. then, display a message.

public function submitForm(array &$form, FormStateInterface $form_state) {
  /**
   * my logic
   **/
  if ($isDeleted) {
    $this->messenger()->addMessage('Logged out');
    user_logout();
    $home = \Drupal\Core\Url::fromRoute('<front>')->setAbsolute();
    $form_state->setRedirectUrl($home);
  }
}

This code works fine, but the message doesn't show up. I read/assumed that the messenger is linked to the current session, so by log out the user, the messenger is destroyed.

So I tried to create another messenger after the user logout, but still, the message isn't displayed.

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6
  • Might seem obvious but is the "Status messages" block definitely set to show on your homepage? Do other messages display on your homepage ok?
    – unusedspoon
    Commented Dec 2, 2022 at 11:18
  • Yes, if I remove the "user_logout()" function, the message works (so the block works)
    – lobafox
    Commented Dec 2, 2022 at 11:20
  • Yes you're probably right the messages are stored via the session which is cleared on logout. Have you tried switching the position in the code of the user_logout() and the message setting? A possible alternative is you redirect to the homepage with a url parameter e.g. ?user_logged_out and then use some JS or something to create/show a message
    – unusedspoon
    Commented Dec 2, 2022 at 11:25
  • yes, I tried to switch the code, no changes. I'd like to avoid to add parameters to the url (at the last resort, I'll probably do it)
    – lobafox
    Commented Dec 2, 2022 at 14:06
  • 1
    There's a core issue related to this. drupal.org/project/drupal/issues/754560
    – imclean
    Commented Dec 6, 2022 at 0:39

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