Error 'Unknown Entity namespace alias' when using 'CompanyNameBundle:User' - symfony

Question

I have a strange problem with Symfony2. I'm working on a project with 40-50 entities, and with one of them this code doesn't work:
$user = $em->getRepository('CompanyUserBundle:User')
->findOneBy([
'username' => $person->getUsername()
]);
I get the error Unknown Entity namespace alias 'CompanyUserBundle'.. The strange thing is that if I change my code to:
$user = $em->getRepository('Company\UserBundle\Entity\User')
->findOneBy([
'username' => $person->getUsername()
]);
It works perfectly... So, what's wrong here? I'm using the getRepository('Alias:Entity') construction all around the code, and there isn't any other problem...
I don't know if it's important, but User is a child entity from FOSUserBundle BaseUser class.
EDIT
Here is my User class (it's located at src/Company/UserBundle/Entity):
namespace Company\UserBundle\Entity;
use FOS\UserBundle\Model\User as BaseUser;
use Doctrine\ORM\Mapping as ORM;
/**
* User
*
* #ORM\Table(name="fos_user")
* #ORM\Entity
*/
class User extends BaseUser
{
/**
*
* #ORM\Id
* #ORM\Column(type="integer")
* #ORM\GeneratedValue(strategy="AUTO")
*/
protected $id;
public function __construct()
{
parent::__construct();
// your own logic
}
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
}
And here a part of my AppKernel.php:
class AppKernel extends Kernel
{
public function registerBundles()
{
$bundles = array(
new Symfony\Bundle\FrameworkBundle\FrameworkBundle(),
new Symfony\Bundle\SecurityBundle\SecurityBundle(),
new Symfony\Bundle\TwigBundle\TwigBundle(),
/* ... other, non interesting, bundles... */
new Company\UserBundle\UserBundle(),
new FOS\UserBundle\FOSUserBundle(),
new FR3D\LdapBundle\FR3DLdapBundle(),
new JMS\AopBundle\JMSAopBundle(),
new JMS\SecurityExtraBundle\JMSSecurityExtraBundle(),
new JMS\DiExtraBundle\JMSDiExtraBundle($this),
);
}
}
More information: as #herr said in the comments, using
$user = $em->getRepository('UserBundle:User')
->findOneBy([
'username' => $person->getUsername()
]);
works fine... But I don't understand why. Why in this bundle the namespace alias is UserBundle instead of CompanyUserBundle? I know that this must be a really silly error, but I can't see it...

Answer 1

You can check in your UserBundle's Bundle class file it will with UserBundle.php instead of CompanyUserBundle.php.
Just try using
$em->getRepository('UserBundle:User')
instead
$em->getRepository('CompanyUserBundle:User')
I think it's namespace / BundleClassName may be only UserBundle not CompanyUserBundle in this case.
Thanks.

Answer 2

I got the same error but the reason was different, because Entity's were in different bundle/package.
The problem caused by the mapping misconfiguration. Changing alias to the correct one solved the issue
doctrine:
dbal:
# ...
orm:
# ...
mappings:
App:
# ...
prefix: 'Company\UserBundle\Entity'
alias: CompanyUserBundle # <-- this alias is used when you do CompanyUserBundle:User
for more information: https://symfony.com/doc/current/reference/configuration/doctrine.html