Symfony2 Security Form Login

config.yml

# app/config/config.yml

security.config:
    providers:
        default:
            password_encoder: sha1
            entity: { class: UserBundle:User, property: username }

    firewalls:
        public:
            pattern: /.*
            anonymous: true
            form_login: { provider: default }
            logout: true

    access_control:
        - { path: /.*, role: IS_AUTHENTICATED_ANONYMOUSLY }

login.twig

# src/Application/UserBundle/Resources/views/Security/login.twig

{% extends "UserBundle::layout.twig" %}

{% block content %}
{% if error %}
    <div>{{ error }}</div>
{% endif %}

<form action="{% route "_security_check" %}" 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" />

    <input type="submit" name="login" />
</form>
{% endblock %}

routing.yml

# src/Application/UserBundle/Resources/config/routing.yml

_security_login:
    pattern: /login
    defaults: { _controller: UserBundle:Security:login }

_security_check:
    pattern: /login_check
    
_security_logout:
    pattern: /logout

SecurityController.php

<?php // src/Application/UserBundle/Controller/SecurityController.php

namespace Application\UserBundle\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\Controller,
    Symfony\Component\Security\SecurityContext;

class SecurityController extends Controller
{
    public function loginAction()
    {
        // get the error if any (works with forward and redirect -- see below)
        if ($this['request']->attributes->has(SecurityContext::AUTHENTICATION_ERROR)) {
            $error = $this['request']->attributes->get(SecurityContext::AUTHENTICATION_ERROR);
        } else {
            $error = $this['request']->getSession()->get(SecurityContext::AUTHENTICATION_ERROR);
        }

        return $this->render('UserBundle:Security:login.twig', array(
            // last username entered by the user
            'last_username' => $this['request']->getSession()->get(SecurityContext::LAST_USERNAME),
            'error'         => $error,
        ));
    }
}

User.php

<?php // src/Application/UserBundle/Entity/User.php

namespace Application\UserBundle\Entity;

use Symfony\Component\Security\User\AccountInterface,
    Symfony\Component\Security\Encoder\MessageDigestPasswordEncoder;

use Doctrine\Common\Collections\ArrayCollection;

/**
 * @orm:Entity(repositoryClass="Application\UserBundle\Entity\UserRepository")
 * @orm:Table(name="user",
 *     uniqueConstraints={
 *         @orm:UniqueConstraint(name="username_idx", columns={"username"}),
 *         @orm:UniqueConstraint(name="email_idx", columns={"email"})
 *     }
 * )
 * @orm:HasLifecycleCallbacks
 */
class User implements AccountInterface
{
    /**
     * @orm:Column(name="id", type="integer")
     * @orm:Id
     * @orm:GeneratedValue(strategy="AUTO")
     * @var integer
     */
    protected $id;

    /**
     * @orm:Column(name="username", type="string", length="32")
     * @validation:Min(3)
     * @validation:Max(32)
     * @validation:NotBlank
     * @var string
     */
    protected $username;

    /**
     * @orm:Column(name="email", type="string", length="256")
     * @validation:Email
     * @validation:NotBlank
     * @var string
     */
    protected $email;

    /**
     * @orm:Column(name="salt", type="string", length="32")
     * @var string
     */
    protected $salt;

    /**
     * @orm:Column(name="password", type="string", length="40")
     * @validation:NotBlank
     * @var string
     */
    protected $password;

    /**
     * @orm:Column(name="activation_key", type="string", length="32", nullable="true")
     * @var \DateTime
     */
    protected $activationKey;

    /**
     * @orm:Column(name="activation", type="datetime", nullable="true")
     * @var \DateTime
     */
    protected $activation;

    /**
     * @orm:Column(name="last_login", type="datetime", nullable="true")
     * @var \DateTime
     */
    protected $lastLogin;

    /**
     * @orm:Column(name="created", type="datetime")
     * @validation:NotBlank
     * @var \DateTime
     */
    protected $created;

    /**
     * @orm:Column(name="updated", type="datetime")
     * @validation:NotBlank
     * @var \DateTime
     */
    protected $updated;

    /**
     * Constructor.
     */
    public function __construct()
    {
        $this->created = $this->updated = new \DateTime('now');
    }

    /**
     * @return integer
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * @return string
     */
    public function __toString()
    {
        return $this->getUsername();
    }

    /**
     * @return string
     */
    public function getUsername()
    {
        return $this->username;
    }

    /**
     * @param string $username
     */
    public function setUsername($username)
    {
        $this->username = $username;
    }

    /**
     * @return string
     */
    public function getEmail()
    {
        return $this->email;
    }

    /**
     * @param string $email
     */
    public function setEmail($email)
    {
        $this->email = $email;
    }

    /**
     * @return string
     */
    public function getPassword()
    {
        return $this->password;
    }

    /**
     * @param string $password
     */
    public function setPassword($password)
    {
        $encoder = new MessageDigestPasswordEncoder('sha1');
        $password = $encoder->encodePassword($password, $this->getSalt());

        $this->password = $password;
    }

    /**
     * @return string
     */
    public function getActivationKey()
    {
        if (null === $this->activationKey) {
            $this->activationKey = md5(sprintf(
                '%s_%d_%s_%f_%s_%d',
                uniqid(),
                rand(0, 99999),
                $this->getUsername(),
                microtime(true),
                $this->getEmail(),
                rand(99999, 999999)
            ));
        }

        return $this->activationKey;
    }

    /**
     * @return \DateTime
     */
    public function getActivation()
    {
        return $this->activation;
    }

    /**
     * @param \DateTime $activation
     */
    public function setActivation(\DateTime $activation)
    {
        $this->activation = $activation;
    }

    /**
     * @return \DateTime
     */
    public function isActivated()
    {
        return (boolean) $this->activation;
    }

    /**
     * @return \DateTime
     */
    public function getLastLogin()
    {
        return $this->lastLogin;
    }

    /**
     * @param \DateTime $lastLogin
     */
    public function setLastLogin(\DateTime $lastLogin)
    {
        $this->lastLogin = $lastLogin;
    }

    /**
     * @return \DateTime
     */
    public function getCreated()
    {
        return $this->created;
    }

    /**
     * @return \DateTime
     */
    public function getUpdated()
    {
        return $this->updated;
    }

    /**
     * @orm:PreUpdate
     */
    public function update()
    {
        $this->updated = new \DateTime('now');
    }

    // AccountInterface

    /**
     * @return string
     */
    public function getSalt()
    {
        if (null === $this->salt) {
            $this->salt = md5(sprintf(
                '%s_%d_%f',
                uniqid(),
                rand(0, 99999),
                microtime(true)
            ));
        }

        return $this->salt;
    }

    /**
     * @return array
     */
    public function getRoles()
    {
        return array('ROLE_USER', 'ROLE_ADMIN');
    }

    /**
     * @return void
     */
    public function eraseCredentials()
    {
        $this->roles = null;
    }
}

UserRepository.php

<?php // src/Application/UserBundle/Entity/UserRepository.php

namespace Application\UserBundle\Entity;

use Symfony\Component\Security\User\UserProviderInterface;

use Doctrine\ORM\EntityRepository;

class UserRepository extends EntityRepository implements UserProviderInterface
{
    /**
     * @param string $username
     * @return \Application\UserBundle\Entity\User
     */
    public function loadUserByUsername($username)
    {
        return $this->findOneBy(array('username' => $username));
    }
}

UserRepositoryTest.php

<?php // src/Application/UserBundle/Tests/Entity/UserRepositoryTest.php

namespace Application\UserBundle\Tests\Entity;

use Symfony\Bundle\FrameworkBundle\Test\WebTestCase;

class UserRepositoryTest extends WebTestCase
{
    /**
     * @var \Application\UserBundle\Entity\UserRepository
     */
    protected $repository;

    protected function setUp()
    {
        $kernel = $this->createKernel();
        $kernel->boot();

        $this->repository = $kernel
            ->getContainer()
            ->get('doctrine.orm.entity_manager')
            ->getRepository('UserBundle:User');
    }

    public function testLoadUserByUsername()
    {
        $user = $this->repository->loadUserByUsername('pminnieur');
        $this->assertEquals('example', $user->getUsername());
    }
}

UserTest.php

<?php // src/Application/UserBundle/Tests/Entity/UserTest.php

namespace Application\UserBundle\Tests\Entity;

use Application\UserBundle\Entity\User;

class UserTest extends \PHPUnit_Framework_TestCase
{
    public function testConstructorSetsTimestamps()
    {
        $user = new User();

        $dateTime = new \DateTime('now');
        $this->assertEquals($dateTime, $user->getCreated());
        $this->assertEquals($dateTime, $user->getUpdated());
    }

    public function testLifecycleCallbacks()
    {
        $user = new User();
        $dateTime = new \DateTime('now');

        sleep(1);
        $user->update();
        $this->assertGreaterThan($dateTime, $user->getUpdated());
    }

    public function testToString()
    {
        $user = new User();

        $user->setUsername('example');
        $this->assertEquals('example', (string) $user);
    }

    public function testUsername()
    {
        $user = new User();

        $user->setUsername('example');
        $this->assertEquals('example', $user->getUsername());
    }

    public function testEmail()
    {
        $user = new User();

        $user->setEmail('mail@example.org');
        $this->assertEquals('mail@example.org', $user->getEmail());
    }

    public function testPassword()
    {
        $user = new User();
        $this->assertNull($user->getPassword());

        $encoder = new \Symfony\Component\Security\Encoder\MessageDigestPasswordEncoder('sha1');
        $password = $encoder->encodePassword('example', $user->getSalt());

        $user->setPassword('example');
        $this->assertEquals($password, $user->getPassword());
    }

    public function testActivation()
    {
        $user = new User();
        $this->assertFalse($user->isActivated());

        $dateTime = new \DateTime('now');
        $user->setActivation($dateTime);
        $this->assertEquals($dateTime, $user->getActivation());
        $this->assertTrue($user->isActivated());
    }

    public function testActivationKeyIsOnlyGeneratedOnce()
    {
        $user = new User();

        $key = $user->getActivationKey();
        $this->assertEquals($key, $user->getActivationKey());
    }

    public function testLastLogin()
    {
        $user = new User();
        $this->assertNull($user->getLastLogin());

        $dateTime = new \DateTime('now');
        $user->setLastLogin($dateTime);
        $this->assertEquals($dateTime, $user->getLastLogin());
    }

    public function testSaltIsOnlyGeneratedOnce()
    {
        $user = new User();

        $salt = $user->getSalt();
        $this->assertEquals($salt, $user->getSalt());
    }
}

it gives error like
FileLoaderLoadException: Cannot import resource "/var/www/Symfony/app/config/config.yml" from "/var/www/Symfony/app/config/config_dev.yml". (There is no extension able to load the configuration for "Security.config" (in /var/www/Symfony/app/config/config.yml). Looked for namespace "Security.config", found "framework", "security", "twig", "monolog", "swiftmailer", "assetic", "doctrine", "sensio_framework_extra", "application_user", "acme_demo", "web_profiler", "sensio_distribution")