Esempio user registration form

RegistrationFormType.php

use FOS\UserBundle\Form\Type\RegistrationFormType as BaseType;

class RegistrationFormType extends BaseType
{
    public function buildForm(FormBuilder $builder, array $options)
    {
        parent::buildForm($builder, $options);

        $builder->add('userType');
    }

    public function getName()
    {
        return 'foo_user_registration';
    }
}

User.php

use FOS\UserBundle\Entity\User as BaseUser;

/**
 * @ORM\Entity
 * @ORM\Table(name="user")
 */
class User extends BaseUser
{
    /**
     * @ORM\Id
     * @ORM\Column(type="integer", nullable="false")
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    protected $id;

    /**
     * @orm\ManyToOne(targetEntity="UserType", inversedBy="users", cascade={"persist", "remove"})
     * @orm\JoinColumn(name="userType", referencedColumnName="id")
     */
    protected $userType;
}

UsersController.php

class UsersController extends Controller
{
    public function postUsersAction()
    {
        $form = $this->createForm(
            $this->get('foo_user.registration.form.type'), 
            new User(),
            array('validation_groups'   =>  array('Registration')
        ));
        
        $form->bind($this->getRequest()->get($form->getName()));
        $form->isValid();

        // ecc...
    }
}

UserType.php

/**
 * @ORM\Entity
 * @ORM\Table(name="user_type")
 */
class UserType
{
    /**
     * @ORM\Id
     * @ORM\Column(type="integer", nullable="false")
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    protected $id;

    /**
     * @orm\OneToMany(targetEntity="User", mappedBy="userType")
     * @var User[]
     */
    protected $users;
}