php – Why can't doctrine supply the correct id when creating a database record in postgresql?

Question:

Good day.

There are two entities and there is a one-to-one relationship. These are users and user_info. I linked them like this:

/**
 * Users
 *
 * @ORM\Table(name="users")
 * @ORM\Entity
 * @UniqueEntity("email")
 */
class User implements UserInterface
{
    /**
     * @var integer
     * @ORM\Id
     * @ORM\Column(nullable=false)
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

// ...
/**
     * @ORM\OneToOne(targetEntity="AppBundle\Entity\UserInfo", mappedBy="user", cascade={"persist"})
     */
    protected $information;


/**
 * UserInfo
 *
 * @ORM\Table(name="user_info")
 * @ORM\Entity
 */
class UserInfo
{
    /**
     * @var integer
     * @ORM\Id
     * @ORM\Column(nullable=false)
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @ORM\OneToOne(targetEntity="AppBundle\Entity\User", inversedBy="userInfo")
     * @ORM\JoinColumn(name="id", referencedColumnName="id", nullable=false)
     */
    protected $user;

I add data like this:

$user = $form->getData();
            $user->setCreated(date('Y-m-d H:i:s'));

            $user->getInformation()->setBalance(0);
            $user->getInformation()->setRevShare(0);
            $user->getInformation()->setMessengerType('skype');

            $encoder = $this->container->get('security.password_encoder');
            $encoded = $encoder->encodePassword($user, $user->getPassword());

            $user->setPassword($encoded);
            $em = $this->getDoctrine()->getManager();

            $em->persist($user);
            $em->flush();

The bottom line is that the id of the main entity (Users) is set, and the User_info id is set to null and PG refuses to execute such a request, they say, the id cannot be null, although, judging by the symfony profiler, the doctrine fulfills both requests:

SELECT NEXTVAL('users_id_seq');
SELECT NEXTVAL('user_info_id_seq');

What can be wrong?

Answer:

Doc: Saving Related Entities

Apparently the problem is that you are trying to get the Information object from there, where it does not yet exist. Try to do as the documentation says – first create an object, then add it to the associated one:

...
$information = new UserInfo();
$information->setBalance(0)
    ->setRevShare(0)
    ->setMessengerType('skype');
$user->setInformation($information);

/**
вместо
$user->getInformation()->setBalance(0);
$user->getInformation()->setRevShare(0);
$user->getInformation()->setMessengerType('skype');
**/
...