Symfony ONE-TO-ONE relation - symfony

Question

I am new to symfony2 and have trouble to do a left join between 2 entities. I'm getting following error message, and don't know how to solve this problem:
[Semantical Error] line 0, col 69 near 'i': Error: Class
Bundle\Entity\Users has no association named user_id
Entity Users:
class Users
{
/**
* #ORM\Id
* #ORM\Column(name="user_id", type="string", length="16")
* #ORM\OneToOne(targetEntity="UsersInformation", mappedBy="Users")
*/
protected $user_id;
/**
* #ORM\Column(type="string", length="255")
*/
protected $username;
/**
* #ORM\Column(type="string", length="32")
*/
protected $password;
...
/**
* Set user_id
*
* #param string $userId
*/
public function setUserId($userId)
{
$this->user_id = $userId;
}
/**
* Get user_id
*
* #return string
*/
public function getUserId()
{
return $this->user_id;
}
...
}
Entity UsersInformation:
class UsersInformation
{
/**
* #ORM\Id
* #ORM\Column(type="string", length="16")
* #ORM\OneToOne(targetEntity="Users", inversedBy="UsersInformation")
* #ORM\JoinColumn(name="user_id", referencedColumnName="user_id")
*/
protected $user_id;
/**
* #ORM\Column(type="string", length="255")
*/
public $email;
/**
* #ORM\Column(type="string", length="1")
*/
public $gender;
/**
* #ORM\Column(type="string", length="255")
*/
public $company;
....
}
The UsersRepository looks like this:
public function getAllUsers($limit = null)
{
$qb = $this->createQueryBuilder('u')
->select('u, i')
->leftJoin('u.user_id', 'i');
if (false === is_null($limit))
$qb->setMaxResults($limit);
return $qb->getQuery()
->getResult();
}
What I'm doing wrong?

Answer 1

I think the querybuilder looks alright. Your problem is likely in the data structure.
The way you normally approach this is by setting up a property per relation. For your Users class it'd make sense to have an information or userInformation one for example.
Perhaps something like this helps?
class User
{
/**
* #ORM\Id
*/
protected $id;
/**
* #ORM\OneToOne(targetEntity="UserInformation")
*/
protected $information;
}
class UserInformation
{
/**
* #ORM\Id
*/
protected $id;
/**
* #ORM\OneToOne(targetEntity="User", inversedBy="information")
* #ORM\JoinColumn(name="user_id", referencedColumnName="id")
*/
protected $user;
}