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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Bridge\Doctrine\Form\EventListener;
use Doctrine\Common\Collections\Collection;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\Form\FormEvent;
use Symfony\Component\Form\FormEvents;
/**
* Merge changes from the request to a Doctrine\Common\Collections\Collection instance.
*
* This works with ORM, MongoDB and CouchDB instances of the collection interface.
*
* @author Bernhard Schussek <bschussek@gmail.com>
*
* @see Collection
*/
class MergeDoctrineCollectionListener implements EventSubscriberInterface
{
public static function getSubscribedEvents()
{
// Higher priority than core MergeCollectionListener so that this one
// is called before
return [
FormEvents::SUBMIT => [
['onSubmit', 5],
],
];
}
public function onSubmit(FormEvent $event)
{
$collection = $event->getForm()->getData();
$data = $event->getData();
// If all items were removed, call clear which has a higher
// performance on persistent collections
if ($collection instanceof Collection && 0 === \count($data)) {
$collection->clear();
}
}
}
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