//AppBundle\Controller\AdminController.php

    /.../
    /**
     *
     * @Route("/admin/register-doctor", name="doctor-registration")
     */
    public function registerAction(Request $request)
    {
        /** @var $userManager \FOS\UserBundle\Model\UserManagerInterface */
        $userManager = $this->get('fos_user.user_manager');


        $user = $userManager->createUser();

        $personal = new PersonPersonal();
        $info = new PersonMainInfo();
        $personal->setPersonMainInfo($info);
        $personal->setPersonal($user);

        $form = $this->createForm(PersonPersonalType::class, $personal,array(
            'action' => $this->generateUrl('doctor-registration'),
            'method' => 'POST'));


            $form->handleRequest($request);

            if ($form->isSubmitted() && $form->isValid()) {
                dump($form->getData());dump($form->getErrors());die;


                $form->getData();
                $user->setPlainPassword("Default");
                $userManager->updateUser($user);

                $em = $this->getDoctrine()->getEntityManager();

                $personal->setCreationDate(new \DateTime());
                $em->persist($info);
                $em->flush();
                $em->persist($personal);
                $em->flush();

                $request->getSession()->getFlashBag()->add(
                    'success',
                    'Personalo darbuotojas sėkmingai pridėtas'
                );
                return $this->redirectToRoute('admin');
            } else {
                $errors = $form->getErrors();
                if (!empty($errors)) {
                    foreach ($errors as $error) {
                        $request->getSession()->getFlashBag()->add(
                            'error',
                            $error->getMessage()
                        );
                    }
                }
            }

            return $this->render('main/register-doctor.html.twig', array(
                'form' => $form->createView(),
            ));
        /.../
        }

    //AppBundle\Entity\PersonMainInfo.php

    /.../

    /**
     * @var string
     * @Assert\NotBlank()
     * @ORM\Column(name="address", type="string", length=500, nullable=true)
     */
     private $address;
    /**
     * @var string
     * @Assert\Email(
     *     message = "The email '{{ value }}' is not a valid email.",
     *     checkMX = true
     * )
     * @ORM\Column(name="email", type="string", length=600, nullable=true)
     */
    private $email;
    /.../

    //AppBundle\Form\Type\PersonMainInfoType.php

    /.../

    class PersonMainInfoType extends AbstractType
    {
         public function buildForm(FormBuilderInterface $builder, array $options)
         {
             // Validations only in Entity class with annotations? or need to validate here to??
              $builder
                     ->add('name')
                     ->add('lastname')
                     ->add('birth_date', DateType::class, array(
                         'placeholder' => array(
                             'year' => 'Year', 'month' => 'Month', 'day' => 'Day',  'format' => 'yyyy-MM-dd',
                              )))
                     ->add('address')
                     ->add('city')
                     ->add('phone')
                     ->add('email')
                     ->add('job')
                     ->add('doctor');
    }

    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults([
            'data_class' => 'AppBundle\Entity\PersonMainInfo',
        ]);
    }
}