Doctrine2: эмулируем timestampable behavior через lifecycle callback

Vendor\MyBundle\Entity\User:
  type: entity
  table: user
  id:
    id:
      type: bigint
      generator:
        strategy: AUTO
  fields:
    # ...
    updated:
      type: datetime
      nullable: true
    created:
      type: datetime
      nullable: true

<?php
// Vendor/MyBundle/Entity/User.php
class User{
    // ....    
    /**
     * @var datetime $created
     */
    private $created;
 
    /**
     * @var datetime $updated
     */
    private $updated;
 
    public function __construct()
    {
        $this->created = $this->updated = new \DateTime("now");
    }
    // ....    
}

Vendor\MyBundle\Entity\User:
  type: entity
  table: user
  # ...
  lifecycleCallbacks:
    preUpdate: [ preUpdate ]

<?php
// Vendor/MyBundle/Entity/User.php
class User{
    // ....    
    /**
     * @orm:preUpdate
     */
    public function preUpdate()
    {
        $this->updated = new \DateTime("now");
    }
    // ....    
}