ayudasymfony

//entidad usuario
<?php

namespace Actas\MainBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;
use Symfony\Component\Validator\Constraints as Assert;
use Symfony\Component\Security\Core\User\UserInterface;


/**
 * Usuarios
 *
 * @ORM\Table(name="usuarios")
 * @ORM\Entity(repositoryClass="Actas\MainBundle\Repository\UsuariosRepository")
 * @UniqueEntity(fields="usuario", message="Ese Usuario ya existe")
 */
class Usuarios implements UserInterface, \Serializable
{
    /**
     * @var int
     *
     * @ORM\Column(name="id", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @var string
     *
     * @ORM\Column(name="usuario", type="string", length=100, unique=true)
     * @Assert\NotBlank(message="no deje en blanco")
     */
    private $usuario;

    /**
     * @var string
     *
     * @ORM\Column(name="contrasea", type="string", length=64)
     */
    private $contrasea;

    /**
     * @var bool
     *
     * @ORM\Column(name="is_activo", type="boolean")
     *
     */
    private $is_activo = 0;

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

    /**
     * Set usuario
     *
     * @param string $usuario
     * @return Usuarios
     */
    public function setUsuario($usuario)
    {
        $this->usuario = $usuario;

        return $this;
    }

    /**
     * Get usuario
     *
     * @return string
     */
    public function getUsuario()
    {
        return $this->usuario;
    }

    /**
     * Set contrasea
     *
     * @param string $contrasea
     * @return Usuarios
     */
    public function setContrasea($contrasea)
    {
        $this->contrasea = $contrasea;

        return $this;
    }

    /**
     * Get contrasea
     *
     * @return string
     */
    public function getContrasea()
    {
        return $this->contrasea;
    }
    /**
     * Get is_activo
     *
     * @return boolean
     */
    public function getIsactivo()
    {
        return (boolean)$this->is_activo;
    }

    /**
     * Set is_activo
     *
     * @param boolean is_activo
     * @return Usuarios
     */
    public function setIsactivo($is_activo)
    {
        (boolean)$this->is_activo = $is_activo;

        return $this;
    }

    public function eraseCredentials() {

    }

    public function getPassword() {

    }

    public function getRoles() {
        return array('ROLE_USER');

    }

    public function getSalt() {

    }

    public function getUsername() {

    }

    public function serialize() {
        return serialize(array(
        $this->id,
        $this->usuario,
        $this->contrasea,
        $this->is_activo
        ));

    }

    public function unserialize($serialized) {
        list(
        $this->id,
        $this->usuario,
        $this->contrasea,
        $this->is_activo
                )=  unserialize($serialized);
    }

}


//login_controller
<?php

namespace Actas\MainBundle\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Symfony\Component\HttpFoundation\Request;

class LoginController extends Controller
{
    /**
     * @Route("/login", name="login")
     */
    public function loginAction(Request $request)
    {
        $authenticationUtils = $this->get('security.authentication_utils');

    // get the login error if there is one
    $error = $authenticationUtils->getLastAuthenticationError();

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

    return $this->render(
        'ActasMainBundle:login:login.html.twig',
        array(
            // last username entered by the user
            'last_username' => $lastUsername,
            'error'         => $error,
        )
    );



    }

     /**
     * @Route("/logout", name="logout")
     */
    public function logoutAction()
    {

    }

}


//security.yml
# To get started with security, check out the documentation:
# http://symfony.com/doc/current/book/security.html
security:
    encoders:
        Actas\MainBundle\Entity\Usuarios:
            algorithm: bcrypt

    providers:
        mysql:
            entity:
                class: ActasMainBundle\Entity\Usuarios
                property: usuario
    # http://symfony.com/doc/current/book/security.html#where-do-users-come-from-user-providers


    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: ~
            form_login:
                login_path: login
                check_path: login

    access_control:
      - {path: ^/login, roles: IS_AUTHENTICATED_ANONYMOUSLY}
      - {path: ^/usuarios, roles: ROLE_USER}

//login twig

{% block inputs %}
    {% if error %}
    <div>{{ error.messageKey|trans(error.messageData, 'security') }}</div>
{% endif %}

<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>
{% endblock %}