The class 'Login\Entity\User' was not found in the chain configured namespaces \Entity - zend-framework2

Question

i'm using zf2 and doctrine that i've configured module.config.php like this
return array(
'doctrine' => array(
'driver' => array(
__NAMESPACE__. '_driver' => array(
'class' => 'Doctrine\ORM\Mapping\Driver\AnnotationDriver',
'cache' => 'array',
'paths' => array(__DIR__ . '/../src/' . __NAMESPACE__ . '/Entity')
),
'orm_default' => array(
'drivers' => array(
__NAMESPACE__.'\Entity' => __NAMESPACE__.'_driver'
)
)
)
),
and my LoginController
class LoginController extends AbstractRestfulController {
public function indexAction() {
$em = $this->getServiceLocator()-> get('Doctrine\ORM\EntityManager');
$usr = new User();
$usr->setUsername('yassine');
$usr->setPassword('yassine');
$usr->setEmail('yassine#gmail.com');
$em->persist($usr);
$em->flush(); } }
and my class user /Login/Entity/User
use Doctrine\ORM\Mapping as ORM;
/**
* #ORM\Entity
* #ORM\Table(name="user")
*/
class User
{
/**
* #ORM\Id
* #ORM\GeneratedValue
* #ORM\Column(name="id")
*/
protected $id;
/**
* #ORM\Column(name="username")
*/
protected $username;
/**
* #ORM\Column(name="password")
*/
protected $password;
/**
* #ORM\Column(name="email")
*/
protected $email;
// Returns ID of the user
public function getId()
{
return $this->id;
}
// Sets ID of the user.
public function setId($id)
{
$this->id = $id;
}
// Returns username.
public function getUsername()
{
return $this->username;
}
// Sets username.
public function setUsername($username)
{
$this->username = $username;
}
// Returns password.
public function getPassword()
{
return $this->password;
}
// Sets Password.
public function setPassword($password)
{
$this->password = $password;
}
// Sets email.
public function setEmail($email)
{
$this->email = $email;
}
// Returns email.
public function getEmail()
{
return $this->email;
}
}
The problem that it shows me this message Mapping Exception :
The class 'Login\Entity\User' was not found in the chain configured namespaces \Entity

Answer 1

It seems __NAMESPACE__ is empty in your module.config.php and that’s why Doctrine sees the following:
'drivers' => [
'\Entity' => '_driver'
]
instead of:
'drivers' => [
'Login\Entity' => 'Login_driver'
]
To fix this issue, you have to declare the namespace used in module.config.php. In other words, put the following:
namespace Login;
at the top of the file, right after PHP opening tag.
Another solution would be to replace all __NAMESPACE__ occurrences with 'Login' string.