Symfony2 FOSUserBundle Invitation : only work on owning side associations - symfony

Question

Entity/User
namespace My\SampleBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\Validator\Constraints as Assert;
/**
* #ORM\Entity
* #ORM\Table(name="fos_user")
*/
class User extends \FOS\UserBundle\Entity\User
{
/** #ORM\Id #ORM\Column(type="integer") #ORM\GeneratedValue(strategy="AUTO") */
protected $id;
/**
* #ORM\OneToOne(targetEntity="Invitation", inversedBy="user")
* #ORM\JoinColumn(referencedColumnName="code")
* #Assert\NotNull(message="Your invitation is wrong")
*/
protected $invitation;
public function setInvitation(Invitation $invitation)
{
$this->invitation = $invitation;
}
public function getInvitation()
{
return $this->invitation;
}
}
Entity/Invitation
namespace My\SampleBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/** #ORM\Entity */
class Invitation
{
/** #ORM\OneToOne(targetEntity="User", mappedBy="invitation", cascade={"persist", "merge"}) */
protected $user;
/** #ORM\Id #ORM\Column(type="string", length=6) */
protected $code;
/** #ORM\Column(type="string", length=256) */
protected $email;
/**
* When sending invitation be sure to set this value to `true`
*
* It can prevent invitations from being sent twice
*
* #ORM\Column(type="boolean")
*/
protected $sent = false;
public function __construct()
{
// generate identifier only once, here a 6 characters length code
$this->code = substr(md5(uniqid(rand(), true)), 0, 6);
}
public function getCode()
{
return $this->code;
}
public function getEmail()
{
return $this->email;
}
public function setEmail($email)
{
$this->email = $email;
}
public function isSent()
{
return $this->sent;
}
public function send()
{
$this->sent = true;
}
public function getUser()
{
return $this->user;
}
public function setUser(User $user)
{
$this->user = $user;
}
/**
* Set code
*
* #param string $code
* #return Invitation
*/
public function setCode($code)
{
$this->code = $code;
return $this;
}
/**
* Set sent
*
* #param boolean $sent
* #return Invitation
*/
public function setSent($sent)
{
$this->sent = $sent;
return $this;
}
/**
* Get sent
*
* #return boolean
*/
public function getSent()
{
return $this->sent;
}
}
Error
You cannot search for the association field
'My\SampleBundle\Entity\Invitation#user', because it is the inverse
side of an association. Find methods only work on owning side
associations. 500 Internal Server Error - ORMException
I am the stage which just performed the documentation.
https://github.com/FriendsOfSymfony/FOSUserBundle/blob/master/Resources/doc/adding_invitation_registration.md
The display of the bundle is normal. However, It has become an error if I submit registration form.
Any help?
EDIT:
Actually, I had set up 'inversedBy' at first.
A pre-question.
Symfony2 FOSUserBundle Invitation : 'inversedBy' mapping errors
On the surface, it does work. However, mapping errors is displayed by profiler.
My\SampleBundle\Entity\Invitation# does not contain the required
'inversedBy' attribute.
so, I changed it in response to advice.
I don't know what to think of it.

Answer 1

It's just as the error says. Instead of mappedBy, you should use inversedBy on the Invitation entity and use mappedBy on the User entity for $invitation.
/** #ORM\OneToOne(targetEntity="User", inversedBy="invitation", cascade={"persist", "merge"}) */
protected $user;
You can also overcome this problem by creating a custom repository method to find user based on invitation.

Answer 2

There was solution.
https://github.com/FriendsOfSymfony/FOSUserBundle/issues/800
public function reverseTransform($value)
{
// ...
return $this->entityManager
->getRepository('My\SampleBundle\Entity\Invitation')
->findOneBy(array(
'code' => $value,
'user' => null, <= Removing 'user' solves the issue
));
}

Answer 3

I ended up modifying my transformer to the following:
public function reverseTransform($value)
{
if (null === $value || '' === $value) {
return null;
}
if (!is_string($value)) {
throw new UnexpectedTypeException($value, 'string');
}
$invitation = $this->entityManager
->getRepository('SixString\PearBundle\Entity\Invitation')
->findOneBy(array(
'code' => $value,
));
if($this->entityManager->getRepository('SixString\PearBundle\Entity\User')->findOneBy(array("invitation" => $invitation))){
return null;
}
return $invitation;
}
I stripped out the 'user' => null but added a check to see if the invitation has already been used