How do redirect a user after login to a route that requires the UID?

Question

I know, this seems like a basic question:

In Drupal 9 how do I redirect a user after logging in to a path/route that requires the UID in the path?

I've researched and tried different implementations but none of them support tokens (Rules, Redirect After Login, etc.)

For example, after a user logs in they should land on "/homebox-page/dashboard/UID" <- numerical value from current user ID.

I was hoping for a simple module to handler this but it looks like I may need to do it through custom code?

Answer 1

This should be possible with a few lines of custom code. The user login form redirects already to entity.user.canonical, which requires the UID:

  public function submitForm(array &$form, FormStateInterface $form_state) {

    if (empty($uid = $form_state->get('uid'))) {
      return;
    }
    $account = $this->userStorage->load($uid);

    // A destination was set, probably on an exception controller.
    if (!$this->getRequest()->request->has('destination')) {
      $form_state->setRedirect(
        'entity.user.canonical',
        ['user' => $account->id()]
      );
    }
    else {
      $this->getRequest()->query->set('destination', $this->getRequest()->request->get('destination'));
    }

    user_login_finalize($account);
  }
  

You could add your own submit handler doing the same, overwriting the redirect. There you can use \Drupal::currentUser() because user_login_finalize() in the core submit handler sets this service with the user just logged in.