Applying conditional query to Doctrine's `getRepository()` - symfony

Question

I am trying to find my feet with Symfony and Doctrine and although I'm guessing it's far from elegant, I have managed to get the below working IF I use findall(). My main issue is that I'm trying to only return events which are yet to occur. Below is my attempt using expr()->gr():
My controller:
namespace AppBundle\Controller;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use AppBundle\Form\Type\RegistrationType;
use AppBundle\Form\Model\Registration;
use AppBundle\Entity\Events;
use Doctrine\ORM\EntityRepository;
class DefaultController extends Controller
{
/**
* #Route("/events", name="events")
*/
public function eventsAction(Request $request)
{
$calendar = $this->getDoctrine()
->getRepository('AppBundle:Events');
$criteria = new \Doctrine\Common\Collections\Criteria();
$criteria->where($criteria->expr()->gt('EventDate',date('Y-m-d H:i:s') ));
$list=$calendar->matching($criteria);
return $this->render('default/events.html.twig', array(
'title' => 'Events',
'list' => $list,
));
}
}
My Events.php entity is:
namespace AppBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* Events
*
* #ORM\Table(name="Events")
* #ORM\Entity
*/
class Events
{
/**
* #var \DateTime
*
* #ORM\Column(name="EventDate", type="date", nullable=false)
*/
private $eventdate;
When I try to load the page I get:
Unrecognized field: EventDate
I'm assuming it's a case-sensitive issue somewhere? I have it in my database (EventDate) and my Events entity annotation specifies name="EventDate". I've tried changing private $eventdate to private $EventDate but this gives me an even more serious looking error so I quickly retreated:
FatalErrorException in DateType.php line 53: Error: Call to a member function format() on a non-object

Answer 1

I have no experience using criteria, but this is very easy to accomplish using the Doctrine Query Language (DQL).
$em = $this->getDoctrine()->getManager();
$result = $em->createQuery(
'SELECT e FROM AppBundle:Events e
WHERE e.eventdate > :date'
)
->setParameter(':date', $date)
->getResult();
$date has to be an instance of \DateTime.