form.post_bind is fired twice - php

Question

I added a form event to my Symfony Form. The problem is that this event seems to be fired twice. When I am debugging, it goes twice into the method and I don't know why.
I have a form Type that uses another form type. I have a VideoFileType form that is adding a field of ImageType. Both of these forms need some process to be done once the form is submitted.
ImageType
<?php
# src/Acme/PhotoBundle/Form/Type/ThumbnailType.php
namespace OSC\MediaBundle\Form\Type;
use OSC\MediaBundle\Manager\ImageManager;
use Symfony\Component\DependencyInjection\Container;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\Extension\Core\ChoiceList\ObjectChoiceList;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\Form\FormEvent;
use Symfony\Component\Form\FormEvents;
use Symfony\Component\HttpKernel\Exception\UnsupportedMediaTypeHttpException;
use Symfony\Component\OptionsResolver\OptionsResolverInterface;
class ImageType extends AbstractType
{
private $imageManager;
public function __construct(ImageManager $imageManager) {
$this->imageManager = $imageManager;
}
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder->add('file', 'file');
$builder->addEventListener(
FormEvents::POST_SUBMIT,
array($this, 'onPostSetData')
);
}
public function getDefaultOptions(array $options) {
return array('data_class' => 'OSC\MediaBundle\Entity\Image');
}
public function setDefaultOptions(OptionsResolverInterface $resolver)
{
$resolver->setDefaults(array(
'data_class' => 'OSC\MediaBundle\Entity\Image'
));
}
public function onPostSetData(FormEvent $event) {
$image = $event->getData();
$form = $event->getForm();
//We need here to update the image file with the new content
$image = $this->imageManager->uploadImage($image);
$event->setData($image);
}
public function getName()
{
return 'image';
}
}
VideoFileType
<?php
# src/Acme/PhotoBundle/Form/Type/ThumbnailType.php
namespace OSC\MediaBundle\Form\Type;
use OSC\MediaBundle\Manager\VideoFileManager;
use Symfony\Component\DependencyInjection\Container;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\Extension\Core\ChoiceList\ObjectChoiceList;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\Form\FormEvent;
use Symfony\Component\Form\FormEvents;
class VideoFileType extends AbstractType
{
public $container;
public $videoPresets = [];
public $videoFileManager;
public function __construct(VideoFileManager $videoFileManager, Container $container) {
$this->container = $container;
$videoPresets = $container->getParameter('osc_media.video.presets');
foreach ($videoPresets as $key => $videoPreset) {
array_push($this->videoPresets, $key);
}
$this->videoFileManager = $videoFileManager;
}
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder->add('thumbnail', 'image');
$builder->add('file', 'file');
$builder->add('videoPreset', 'choice', array(
'choices' => $this->videoPresets,
'multiple' => false,
'required' => true
));
$builder->addEventListener(
FormEvents::POST_SUBMIT,
array($this, 'onPostSetData')
);
$builder->add('save', 'submit');
}
public function onPostSetData(FormEvent $event) {
$videoFile = $event->getData();
$form = $event->getForm();
//We upload the video file
$videoFile = $this->videoFileManager->uploadVideoFile($videoFile);
$event->setData($videoFile);
}
public function getDefaultOptions(array $options) {
return array('data_class' => 'OSC\MediaBundle\Entity\VideoFile');
}
public function getName()
{
return 'video_file';
}
}
I don't know why the onPostSetData method is called twice...