simple login form using symfony

Question

This is my controller

use Symfony\Component\HttpFoundation\Request;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\Security\Http\Authentication\AuthenticationUtils;   

class SecurityController extends Controller
{
/**
 * @Route("/login", name="login")
 */
public function loginAction(Request $request,AuthenticationUtils $authUtils)
{
    // get the login error if there is one
    $error = $authUtils->getLastAuthenticationError();

    // last username entered by the user
    $lastUsername = $authUtils->getLastUsername();

    return $this->render('blog/login.html.twig', array(
            'last_username' => $lastUsername,
            'error'         => $error,
    ));
}
}

This is my security.yml

 providers:
    our_db_provider:
        entity:
            class: AppBundle:user
            property: uname

    in_memory:
        memory: 
            users:
                clement:
                  password: $2y$12$Z2B4JTnglzaYs4z73DBh9u/hIDN/E56CCrLKIjQxP6Q7aeLb5S6LO 
                  roles: 'ROLE_ADMIN'
                admin:
                  password: symfony
                  roles: 'ROLES_ADMIN'
                ryan:
                  password: ryan1234
                  roles: 'ROLES_USER'


encoders:
    Symfony\Component\Security\Core\User\User: 
          algorithm: bcrypt
          cost: 12
    AppBundle\Entity\User:
          algorithm: bcrypt    



firewalls:
    # disables authentication for assets and the profiler, adapt it according to your needs
    dev:
        pattern: ^/(_(profiler|wdt)|css|images|js)/
        security: false


    main:
        anonymous: ~
        # activate different ways to authenticate

        # http://symfony.com/doc/current/security.html#a-configuring-how-your-users-will-authenticate
        http_basic: ~

        # http://symfony.com/doc/current/cookbook/security/form_login_setup.html
        form_login: 
            login_path: login
            check_path: login


    secured_area:
        pattern: ^/
        provider: our_db_provider
        anonymous: ~
        logout: true

access_control:
    # require ROLE_ADMIN for /admin*
    - { path: ^/admin, roles: ROLE_ADMIN }  

This is my view

<form action="{{ path('login') }}" method="post">
<label for="username">Username:</label>
<input type="text" id="username" name="_username" value="{{ last_username }}" />

<label for="password">Password:</label>
<input type="password" id="password" name="_password" />

{#
    If you want to control the URL the user
    is redirected to on success (more details below)
    <input type="hidden" name="_target_path" value="/account" />
#}

<button type="submit">login</button>
</form>

And I get this error.

Controller "AppBundle\Controller\SecurityController::loginAction()" requires that you provide a value for the "$authUtils" argument. Either the argument is nullable and no null value has been provided, no default value has been provided or because there is a non optional argument after this one.

Answer 1

This is not the correct answer to your question but a possible fix

1. change method signature to public function loginAction(Request $request)
2. add $authUtils = $this->get('security.authentication_utils'); at the beginning of your action

Answer 2

If in Symfony 3.3 this feature is not working, you need to:

1. Enable Autowiring
2. Tag your controllers with controller.service_arguments

This is however default setting in symfony, so you only need to change it if you cleared/replaced default services.yml.

If you don't want to use autowire, you can explicitly define argument types.