Gedmo Unrecognized field: createdAt - Error!

[safaksaylam]

Hi,
I use to Gedmo TimestampableEntity. And I didn't serializer object to json.
HTTP 500 Internal Server Error - Unrecognized field: createdAt

User Class Example:

class User extends \DPX\AdminBundle\Model\User
{
    use TimestampableEntity, SoftDeleteableEntity;
    /**
     * @var int
     *
     * @ORM\Column(name="id", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    protected $id;

    /**
     * @var string
     *
     * @ORM\Column(name="username", type="string", length=255, unique=true)
     */
    protected $username;

Action Example
$this->get('jms_serializer')->serialize($user, 'json')

Config Yaml added handlers

jms_serializer:
    handlers:
        datetime:
            default_format: "c"
            default_timezone: "UTC"`

I added JMS Type DateTime in TimestampableEntity createdAt and updatedAt. But It doesn't work. How can i fixed?

[goetas]

please clear your cache directory

[safaksaylam]

I cleared cache. But it doesn't work. @goetas

[goetas]

can you post the full stack-trace for the exception?

[safaksaylam]

I can fixed. Problem is ORM\OrderBy doesn't work with serializer.