namespace BackendBundleRepository;

use BackendBundleEntityUsers;
use SymfonyBridgeDoctrineSecurityUserUserLoaderInterface;
use SymfonyComponentSecurityCoreUserUserInterface;
use SymfonyComponentSecurityCoreExceptionUsernameNotFoundException;
use DoctrineORMEntityRepository;


class UserRepository extends EntityRepository implements UserLoaderInterface {

public function loadUserByUsername($username) {
    return $this->createQueryBuilder('u')
    //$user = $this->createQueryBuilder('u')
            ->where('u.nick = :nick OR u.email = :email')
            ->setParameter('nick', $username)
            ->setParameter('email', $username)
            ->getQuery()
            ->getOneOrNullResult();

//        if (null === $user) {
//            $message = sprintf(
//                    'Unable to find an active admin AppBundle:User object identified by "%s".', $username
//            );
//            throw new UsernameNotFoundException($message);
//        }
//
//        return $user;
}

}

use BackendBundleEntityUsers;
use BackendBundleEntityUserRepository;
use SymfonyBundleFrameworkBundleControllerController;
use SymfonyComponentHttpFoundationRequest;
use SymfonyComponentHttpFoundationSessionSession;
use BackendBundleRepositoryUserRepository;
/**
 * User controller.
 *
 */
class LoginController extends Controller {

private $session;

public function __construct() {
    $this->session = new Session();
}

public function loginAction(Request $request) {  //autentificamos usuarios usando los metodos de symfony de autentificación
    $authenticationUtils = $this->get("security.authentication_utils");

    $error = $authenticationUtils->getLastAuthenticationError();
    $lastUsername = $authenticationUtils->getLastUsername();



    return $this->render('AppBundle:User:login.html.twig', array(
                "error" => $error,
                "last_username" => $lastUsername
    ));
}

Security.yml
security:
    encoders:
        BackendBundleEntityUsers:
            algorithm: bcrypt
            cost: 6

# http://symfony.com/doc/current/security.html#b-configuring-how-users-are-        loaded
    providers:
        user_db_provider:
            entity:
                class: BackendBundle:Users
                #property: email


    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: ~
           provider: user_db_provider
            form_login:
                login_path: /login
                check_path: /login_check
                default_target_path: inscritos_index
                always_use_default_target_path: true
            logout:
                path: logout
                target: /

// BackendBundle/Entity/Users.php

namespace BackendBundleEntity;

use SymfonyComponentSecurityCoreUserUserInterface;
use DoctrineCommonCollectionsArrayCollection;
use SymfonyComponentValidatorConstraints as Assert;
use SymfonyBridgeDoctrineValidatorConstraintsUniqueEntity;
use SymfonyComponentSecurityCoreValidatorConstraints as SecurityAssert;
use SymfonyComponentSecurityCoreUserAdvancedUserInterface;

/**
 * Users
 * @ORMEntity(repositoryClass="BackendBundleRepositoryUserRepository")
 * @UniqueEntity(fields={"email"}, message="¡Este correo ya esta registrado!")
 * @UniqueEntity(fields={"nick"}, message="¡Nick ya esta registrado!")
 */
class Users implements AdvancedUserInterface, Serializable {

    /**
     * @var integer
     */
    private $id;

    /**
     * @var string
     */
    private $role;

    /**
     * @var string
     * @AssertEmail(checkMX=true)
     */
    private $email;

    /**
     * @var string
     * @AssertNotBlank(message = "Por favor, escribe el nombre")
     */
    private $name;

    /**
     * @var string
     * @AssertNotBlank(message = "Por favor, escribe los  apellidos")
     */
    private $surname;

    /**
     * @var string
     * @AssertNotBlank(message = "No puedes dejar el password vacio")
     * @AssertLength(min = 6)
     */
    private $password;

    /**
     * @var string
     */
    private $nick;


    /**
     * @var boolean
     */
    private $isActive = false;


    /**
     * @var string
     */
    private $bloqueo = 'no';

    /**
     * @var string
     */
private $razonBloqueo;


/**
 * Constructor
 */
public function __construct() {
    $this->entry = new DoctrineCommonCollectionsArrayCollection();
    $this->usuarioValida = new DoctrineCommonCollectionsArrayCollection();
    $this->preferenciasUser = new DoctrineCommonCollectionsArrayCollection();

    // $this->isActive = true;  //????? ojo!!!   no esta claro si debe estar o no
    // may not be needed, see section on salt below
    // $this->salt = md5(uniqid('', true));
}

//auth
public function getUsername() {
    return $this->email;
}

public function getSalt() {
    return null;
}

public function getRoles() {
    return array($this->getRole());
}

public function eraseCredentials() {

}

//end auth

/**
 * Set id
 *
 * @param integer $id
 *
 * @return Users
 */
public function setId($id) {
    $this->id = $id;

    return $this;
}

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

/**
 * Set role
 *
 * @param string $role
 *
 * @return Users
 */
public function setRole($role) {
    $this->role = $role;

    return $this;
}

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

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

    return $this;
}

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

/**
 * Set name
 *
 * @param string $name
 *
 * @return Users
 */
public function setName($name) {
    $this->name = $name;

    return $this;
}

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

/**
 * Set surname
 *
 * @param string $surname
 *
 * @return Users
 */
public function setSurname($surname) {
    $this->surname = $surname;

    return $this;
}

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

/**
 * Set password
 *
 * @param string $password
 *
 * @return Users
 */
public function setPassword($password) {
    $this->password = $password;

    return $this;
}

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

/**
 * Set nick
 *
 * @param string $nick
 *
 * @return Users
 */
public function setNick($nick) {
    $this->nick = $nick;

    return $this;
}

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


/**
 * Set isActive
 *
 * @param boolean $isActive
 *
 * @return Users
 */
public function setIsActive($isActive) {
    $this->isActive = $isActive;

    return $this;
}

/**
 * Get isActive
 *
 * @return boolean
 */
public function getIsActive() {
    return $this->isActive;
}


/**
 * Set bloqueo
 *
 * @param string $bloqueo
 *
 * @return Users
 */
public function setBloqueo($bloqueo) {
    $this->bloqueo = $bloqueo;

    return $this;
}

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

/**
 * Set razonBloqueo
 *
 * @param string $razonBloqueo
 *
 * @return Users
 */
public function setRazonBloqueo($razonBloqueo) {
    $this->razonBloqueo = $razonBloqueo;

    return $this;
}

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




public function isAccountNonExpired()
{
    return true;
}

public function isAccountNonLocked()
{
    return true;
}

public function isCredentialsNonExpired()
{
    return true;
}

public function isEnabled()
{
    return $this->isActive;
}


/** @see Serializable::serialize() */
public function serialize() {
    return serialize(array(
        $this->id,
        //$this->username,
        $this->email,
        $this->password,
        $this->isActive,
            // see section on salt below
            // $this->salt,
    ));
}

/** @see Serializable::unserialize() */

public function unserialize($serialized)
    {
        list (
            $this->id,
            //$this->username,
            $this->email,
            $this->password,
            $this->isActive,
        ) = unserialize($serialized);
    }

}