flash_message.md

Flash message

Use $this->addFlash() in your controller, edit src/Controller/ArticleAdminController.php:

class ArticleAdminController extends AbstractController
{
    /**
     * @Route("/admin/article/new", name="admin_article_new")
     */
    public function new(EntityManagerInterface $em, Request $request)
    {
        $form = $this->createForm(ArticleFormType::class);

        $form->handleRequest($request);
        if ($form->isSubmitted() && $form->isValid()) {
            // ...
            $this->addFlash('success', 'Article Created! Knowledge is power!');

            return $this->redirectToRoute('app_homepage');
        }

Display flash in the template templates/base.html.twig:

{% for message in app.flashes('success') %}
    <div class="alert alert-success">
        {{ message }}
    </div>
{% endfor %}