My flask messages don’t display on Symfony 6. I don’t know why. I’d like to display an error message when my user registers incorrectly (e-mail already taken, password and confirmation not identical, invalid username). In the logs, I can see that it works fine, I see that it doesn’t validate because password and confirmation are not identical when I test, but there’s no error message, which should be there thanks to “include”.

here my controller file :

<?php

namespace AppControllerSecurity;

use AppEntityUser;
use AppFormUserType;
use DoctrineORMEntityManagerInterface;
use SymfonyBundleFrameworkBundleControllerAbstractController;
use SymfonyComponentHttpFoundationRequest;
use SymfonyComponentPasswordHasherHasherUserPasswordHasherInterface;
use SymfonyComponentRoutingAnnotationRoute;
use SymfonyComponentValidatorValidatorValidatorInterface;

#[Route(name: 'app_security_')]
class RegisterController extends AbstractController{

  #[Route('/register', name: 'register')]
  public function register(Request $request, UserPasswordHasherInterface $passwordHasher, ValidatorInterface $validator, EntityManagerInterface $em) {

      $user = new User();
      $form = $this->createForm(UserType::class, $user);
      $form->handleRequest($request);

      if($form->isSubmitted()) {
        $errors = $validator->validate($user);
        if($errors->count() <= 0) {

            $datetime = new DateTime('now');
            $user->setRoles([])->setBanned(false)->setCreatedAt($datetime);
            $user->setPassword($passwordHasher->hashPassword($user, $user->getPassword()));

            $em->persist($user);
            $em->flush();

            $this->addFlash('success', "Félicitations, votre compte vient d'être créé !");
            return $this->redirectToRoute('app_security_login');
        } else {
          foreach($errors as $violation) {
            $this->addFlash('error', $violation->getMessage());
          }
        }
      }

      return $this->render('security/register.html.twig', [
          'form' => $form->createView()
      ]);
  }
}

here my template file which include another file :

{% extends 'base.html.twig' %}

{% block container %}

  <h3>Twitya - Inscription</h3>
  <p>Inscrivez-vous sur notre site Twitya.</p>
  <hr class="mb-3">

  <div class="row">
      <div class="col-lg-3 col-md-2"></div>
      <div class="col-lg-6 col-md-8">

        {% include 'includes/_alerts.html.twig' %}

        {{ form_start(form)}}
        <div class="mb-3">
            <label for="inputEmail" class="form-label">Adresse Email</label>
            {{ form_widget(form.email) }}
            <div id="emailHelp" class="form-text">Veuillez conserver votre adresse et pas la partager.</div>
        </div>
        <div class="mb-3">
            <label for="inputPseudo" class="form-label">Pseudonyme</label>
            {{ form_widget(form.username) }}
        </div>
        <div class="mb-3">
            <label for="inputPassword" class="form-label">Mot de passe</label>
            {{ form_widget(form.password) }}
        </div>
        <div class="mb-3">
            <label for="inputPasswordConfirm" class="form-label">Confirmation du mot de passe</label>
            {{ form_widget(form.passwordConfirm) }}
        </div>
        <button type="submit" class="btn btn-primary">S'inscrire</button>
        {{ form_end(form)}}

      </div>
      <div class="col-lg-3 col-md-2"></div>
  </div>

{% endblock %}

and here my template flask messages which I include in my file template above :

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

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

I didn’t find any solutions