Listing 31.18. Klasa Profil: definicja dwukierunkowej relacji 1:1
class Profil
{
    ...

   /**
     * @ORM\OneToOne(targetEntity="User", mappedBy="profil")
     */
    private $user;

    /**
     * Set user
     *
     * @param My\FrontendBundle\Entity\User $user
     */
    public function setUser(\My\FrontendBundle\Entity\User $user)
    {
        $this->user = $user;
    }

    /**
     * Get user
     *
     * @return My\FrontendBundle\Entity\User
     */
    public function getUser()
    {
        return $this->user;
    }

    ...
}