Redirect a user after login. Redirection on Drupal 8.

To make a redirection after user login, we can use the hook hook_user_login().

Note : You cannot use $form_state->setRedirectUrl() directly in the form alter, since it will be overwritten by UserForm::submitForm().

Example : We want to redirect a user to the page "mymodule.dashboard".

/**

 * Implements hook_user_login().

 */

function mymodule_user_login(\Drupal\user\UserInterface $account) {

  // Default login destination to the dashboard.

  $current_request = \Drupal::service('request_stack')->getCurrentRequest();

  if (!$current_request->query->get('destination')) {

    $current_request->query->set(

      'destination',

      \Drupal\Core\Url::fromRoute('mymodule.dashboard')->toString()

    );

  }

}

Tips : Page redirection. Redirect on a basic controller :

$url = \Drupal\Core\Url::fromRoute('user.login')->toString();

$current_request = \Drupal::service('request_stack')->getCurrentRequest();

$current_request->query->set('destination', $url);

return new \Symfony\Component\HttpFoundation\RedirectResponse($url);

CAUTION : The following example is nor workin, Do not use it.

$url = \Drupal\Core\Url::fromRoute('mymodule.DESTINATION_PAGE');

return new \Symfony\Component\HttpFoundation\RedirectResponse($url);