Allow to add a new value in a choice Field Type

Question

I use Form Component and have a choice Field Type on a form which is rendered to a select field. On a client-side I use select2 plugin which initializes the select with the sett

Answer 1

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);
});