Symfony2 $user must be an instanceof UserInterface - symfony

Question

I am having some trouble with login and authentication in Symfony2. The exception is "$user must be an instanceof UserInterface, an object implementing a __toString method, or a primitive string."
Debugging my code I could notice that the user I am trying to log in my application can get authenticated successfully (app/log/dev.log) but the credentials var is null:
The user variable from AbstractToken has the user data from database.
I continue debugging in the ContextListener->refreshUser function and I get these values:
Everything has the value null and on the Symfony\Bridge\Doctrine\Security\User\EntityUserProvider->refreshUser function returns the variable $refreshedUser as null, so when the function $token->setUser($refreshedUser) on the ContextListener class fails and throws the exception.
I write down my security.yml and my entities I am using:
security.yml:
security:
encoders:
Pladuch\BackBundle\Entity\BaseUser:
algorithm: sha512
encode_as_base64: false
iterations: 1
providers:
sga:
entity: { class: 'PladuchBackBundle:Usuario', property: username }
firewalls:
dev:
pattern: ^/(_(profiler|wdt)|css|images|js)/
security: false
sga:
pattern: ^/gestion
anonymous: ~
form_login:
login_path: pladuch_login_sga
check_path: pladuch_login_check
default_target_path: pladuch_sga_index
csrf_provider: form.csrf_provider
provider: sga
logout:
path: pladuch_logout_sga
target: pladuch_login_sga
access_control:
- { path: ^/gestion/login, roles: IS_AUTHENTICATED_ANONYMOUSLY }
- { path: ^/gestion, roles: ROLE_ADMIN }
Abstract class BaseUser:
<?php
namespace Pladuch\BackBundle\Entity;
use Symfony\Component\Security\Core\User\AdvancedUserInterface;
abstract class BaseUser implements AdvancedUserInterface, \Serializable
{
protected $id;
protected $salt;
protected $username;
protected $password;
public function __construct()
{
$this->isActive = true;
$this->salt = $this->generateSalt();
}
public function serialize()
{
return serialize(array($this->id, $this->username, $this->password));
}
public function unserialize($serialized)
{
list($this->id, $this->username, $this->password) = unserialize($serialized);
}
public function getRoles()
{
return array('ROLE_ADMIN');
}
public function getPassword()
{
return $this->password;
}
public function setPassword($password)
{
$this->password = $password;
}
public function getUsername()
{
return $this->username;
}
public function eraseCredentials()
{
}
public function setSalt($salt)
{
$this->salt = $salt;
return $this;
}
public function getSalt()
{
return $this->salt;
}
public function generateSalt()
{
return base_convert(sha1(uniqid(mt_rand(), true)), 16, 36);
}
public function isAccountNonExpired()
{
return true;
}
public function isAccountNonLocked()
{
return true;
}
public function isCredentialsNonExpired()
{
return true;
}
public function isEnabled()
{
return true;
}
}
Class Usuario:
<?php
namespace Pladuch\BackBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* Usuario
*
* #ORM\Table(name="usuario",
* uniqueConstraints={
* #ORM\UniqueConstraint(name="username", columns={"username"})
* },
* indexes={#ORM\Index(name="FK_USUARIO_ROL", columns={"rol_id"})})
* #ORM\Entity(repositoryClass="Pladuch\BackBundle\Repository\UsuarioRepository")
*/
class Usuario extends BaseUser
{
/**
* #var integer
*
* #ORM\Column(name="id", type="integer", nullable=false)
* #ORM\Id()
* #ORM\GeneratedValue(strategy="IDENTITY")
*/
protected $id;
/**
* #var string
*
* #ORM\Column(name="username", type="string", length=255, nullable=false)
*/
protected $username;
/**
* #var string
*
* #ORM\Column(name="password", type="string", length=1024, nullable=false)
*/
protected $password;
/**
* #var string
*
* #ORM\Column(name="salt", type="string", length=1024, nullable=false)
*/
protected $salt;
/**
* #var string
*
* #ORM\Column(name="email", type="string", length=255, nullable=false)
*/
protected $email;
/**
* #var Rol
*
* #ORM\ManyToOne(targetEntity="Rol", inversedBy="id")
* #ORM\JoinColumns({
* #ORM\JoinColumn(name="rol_id", referencedColumnName="id")
* })
*/
protected $rol;
/**
* #var bool
*
* #ORM\Column(name="activo", type="boolean", nullable=true)
*/
protected $activo = true;
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set username
*
* #param string $username
* #return Usuario
*/
public function setUsername($username)
{
$this->username = $username;
return $this;
}
/**
* Get username
*
* #return string
*/
public function getUsername()
{
return $this->username;
}
/**
* Set password
*
* #param string $password
* #return Usuario
*/
public function setPassword($password)
{
$this->password = $password;
return $this;
}
/**
* Get password
*
* #return string
*/
public function getPassword()
{
return $this->password;
}
/**
* Set salt
*
* #param string $salt
* #return Usuario
*/
public function setSalt($salt)
{
$this->salt = $salt;
return $this;
}
/**
* Get salt
*
* #return string
*/
public function getSalt()
{
return $this->salt;
}
/**
* Set email
*
* #param string $email
* #return Usuario
*/
public function setEmail($email)
{
$this->email = $email;
return $this;
}
/**
* Get email
*
* #return string
*/
public function getEmail()
{
return $this->email;
}
/**
* Set rol
*
* #param Rol $rol
* #return Usuario
*/
public function setRol(Rol $rol = null)
{
$this->rol = $rol;
return $this;
}
/**
* Get rol
*
* #return Rol
*/
public function getRol()
{
return $this->rol;
}
/**
* #return array|\Symfony\Component\Security\Core\Role\Role[]
*/
public function getRoles()
{
return array($this->getRol()->getRol());
}
/**
* Set activo
*
* #param $activo
* #return $this
*/
public function setActivo($activo)
{
$this->activo = $activo;
return $this;
}
/**
* Get activo
*
* #return bool
*/
public function getActivo()
{
return $this->activo;
}
}
The UsuarioRepository where I implements the three functions loadUserByUsername, refreshUser and supportsClass:
class UsuarioRepository extends EntityRepository implements UserProviderInterface
{
public function loadUserByUsername($username)
{
$q = $this->createQueryBuilder('u')
->where('u.username = :username')
->setParameter('username', $username)
->getQuery();
try {
$user = $q->getSingleResult();
} catch (NoResultException $e) {
$message = sprintf('Unable to find an active Usuario object identified by %s', $username);
throw new UsernameNotFoundException($message, 0, $e);
}
return $user;
}
public function refreshUser(UserInterface $userInterface)
{
$class = get_class($userInterface);
if (! $this->supportsClass($class)) {
throw new UnsupportedUserException(sprintf('Instances of %s are not suppoted', $class));
}
}
public function supportsClass($class)
{
return $this->getEntityName() === $class || is_subclass_of($class, $this->getEntityName());
}
}
Thank you for your help.
Kind regards.
P.S: I am using Symfony 2.5.6

Answer 1

Ok, I forgot to add the return sentence on refreshUser function in my repository...
return $this->find($userInterface->getId());
or
return $userInterface;
$userInterface has the authenticated user so I didn't need the $this->find() method. That solved everything