Allow to add a new value in a choice Field Type
The problem is in a choice transformer, which erases values that don't exist in a choice list.
The workaround with disabling the transformer helped me:
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder->add('choiceField', 'choice', ['choices' => $someList]);
// more fields...
$builder->get('choiceField')->resetViewTransformers();
}
Here's an example code in case someone needs this for EntityType instead of the ChoiceType. Add this to your FormType:
use AppBundle\Entity\Category;
use Symfony\Component\Form\FormEvent;
use Symfony\Component\Form\FormEvents;
$builder->addEventListener(FormEvents::PRE_SUBMIT, function (FormEvent $event) {
$data = $event->getData();
if (!$data) {
return;
}
$categoryId = $data['category'];
// Do nothing if the category with the given ID exists
if ($this->em->getRepository(Category::class)->find($categoryId)) {
return;
}
// Create the new category
$category = new Category();
$category->setName($categoryId);
$this->em->persist($category);
$this->em->flush();
$data['category'] = $category->getId();
$event->setData($data);
});
No, there is not.
You should implement this manually by either:
- using the select2 events to create the new choice via ajax
- catching the posted options before validating the form, and add it to the options list