OneToOne Symfomy2&Doctrine - symfony

Question

I need to save user with his profile fields. I establish relations. User has one Profile, Profile has one User. I add fields to register form. But when I saving object, I get error,
Undefined index: profile in /var/www/Symfony/vendor/doctrine/orm/lib/Doctrine/ORM/UnitOfWork.php line 2714 . Where my mistake, please help me. I am newbie)
Here is the code:
namespace Acme\UserBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* Profile
*
* #ORM\Table(name="acme_profile")
* #ORM\Entity
*/
class Profile
{
/**
* #var integer
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* #ORM\Column(name="fio", type="string", length=255)
*/
protected $fio;
/**
* #ORM\Column(name="birthDate", type="date")
*/
protected $birthDate;
/**
* #ORM\OneToOne(targetEntity="Acme\UserBundle\Entity\User", cascade={"persist"})
* #ORM\JoinColumn(name="user_id", referencedColumnName="id")
*/
protected $user;
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
/**
* #return mixed
*/
public function getFio()
{
return $this->fio;
}
/**
* #param $fio
* #return $this
*/
public function setFio($fio)
{
$this->fio = $fio;
return $this;
}
/**
* #return mixed
*/
public function getBirthDate()
{
return $this->birthDate;
}
/**
* #param $birthDate
* #return $this
*/
public function setBirthDate($birthDate)
{
$this->birthDate = $birthDate;
return $this;
}
/**
* #return mixed
*/
public function getUser()
{
return $this->user;
}
/**
* #param User $user
* #return $this
*/
public function setUser(User $user = null)
{
$this->user = $user;
return $this;
}
}
namespace Acme\UserBundle\Entity;
use FOS\UserBundle\Model\User as BaseUser;
use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\Validator\Constraints as Assert;
/**
* #ORM\Entity
* #ORM\Table(name="acme_user")
*/
class User extends BaseUser
{
/**
* #ORM\Id
* #ORM\Column(type="integer")
* #ORM\GeneratedValue(strategy="AUTO")
*/
protected $id;
/**
* #ORM\OneToOne(targetEntity="Acme\UserBundle\Entity\Profile", cascade={"persist"})
*/
protected $profile;
public function __construct()
{
parent::__construct();
}
public function setProfile(Profile $profile = null)
{
$this->profile = $profile;
return $this;
}
public function getProfile()
{
return $this->profile;
}
}
namespace Acme\UserBundle\Form\Type;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolverInterface;
class RegistrationFormType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
// add your custom field
$builder->add('profile', new ProfileType());
}
public function getParent()
{
return 'fos_user_registration';
}
public function getName()
{
return 'acme_user_registration';
}
/**
* #param OptionsResolverInterface $resolver
*/
public function setDefaultOptions(OptionsResolverInterface $resolver)
{
$resolver->setDefaults(array(
'data_class' => 'Acme\UserBundle\Entity\User'
));
}
}

Answer 1

You should use the MappedBy and InversedBy as specified in the documentation here : http://docs.doctrine-project.org/en/2.0.x/reference/association-mapping.html#owning-side-and-inverse-side
/**
* #ORM\OneToOne(targetEntity="Acme\UserBundle\Entity\Profile",
mappedBy="user"))
*/
and the other side you use :
/**
* #ORM\OneToOne(targetEntity="Acme\UserBundle\Entity\User", inversedBy="profile" cascade={"persist"})
* #ORM\JoinColumn(name="user_id", referencedColumnName="id")
*/