问原理2不调用具有抽象基类的LifecycleCallbacks

EN

abstract class AbstractBase
{
    /**
     * @ORM\Id
     * @ORM\GeneratedValue
     * @ORM\Column(type="integer")
     * @var integer
     */
    protected $id;

    /**
     * @ORM\Column(type="datetime", name="updated_at")
     * @var \DateTime $updatedAt
     */
    protected $updatedAt;

    /**
     * @ORM\PreUpdate
     */
    public function setUpdatedAt()
    {
        die('THIS POINT IS NEVER REACHED');
        $this->updatedAt = new \DateTime();
    }
}

/**
 * @ORM\Entity(repositoryClass="Entity\Repository\UserRepository")
 * @ORM\Table(name="users")
 * @ORM\HasLifecycleCallbacks
 */
class User extends AbstractBase
{
    // some fields, relations and setters/getters defined here, these all work as expected.
}

$user = $this->em->find('Entity\User', 1);
// i call some setters here like $user->setName('asd');
$this->em->flush();
die('end');