Newscoop\GimmeBundle\Form\Type\ImageType::buildForm PHP Метод

    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder->add('description', null, array('required' => false));
        $builder->add('photographer', null, array('required' => false));
        $builder->add('photographer_url', null, array('required' => false));
        $builder->add('place', null, array('required' => false));
        $builder->add('image', 'file', array('constraints' => array(new Assert\File(), new Assert\NotNull())));
        $builder->addEventListener(FormEvents::PRE_SET_DATA, function (FormEvent $event) use($options) {
            $image = $options['image'];
            $form = $event->getForm();
            $form->remove('image');
            if ($image && null !== $image->getId()) {
                $form->add('image', 'file', array('required' => false));
            } else {
                $form->add('image', 'file', array('constraints' => array(new Assert\File(), new Assert\NotNull())));
            }
        });
    }