Form error mapping on collection - symfony

Question

I have a form:
class ArticleType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('autor', AutorType::class)
->add('categories', CollectionType::class, array(
'entry_type' => CategoryType::class,
'error_bubbling' => false,
))
->add('submit', SubmitType::class)
;
}
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults(array(
'data_class' => Article::class,
));
}
}
This embeds to a custom form. my Article entity looks like this:
class Article
{
/**
* #Assert\Type(type="AppBundle\Model\Autor")
* #Assert\Valid()
*/
private $autor;
/**
*
* #Assert\All({
* #Assert\Type(type="AppBundle\Model\Category")
* })
* #Assert\Valid()
*/
private $categories;
}
My problem is a category field error (category name not blank for example); the error is never mapped to the field itself.
With 'error_bubbling' => true,the error is map with ArticleType form.
With 'error_bubbling' => false, the error is map to the collection
CollectionType but never to the CategoryType form or name filed of CategoryType.
I am on Symfony 3.3 and can not use cascade_validation, I use #Assert\Valid() but it don't seem to work as I expected.
Where did I do wrong?
Thanks for your help.

Answer 1

Try using Valid() as form constraint instead of class one. (Be sure to remove class Valid constraint)
Just encountered same thing and after like 20 combinations it was the solution for me. I'm on symfony 3.2 though.
use Symfony\Component\Validator\Constraints\Valid;
class ArticleType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('autor', AutorType::class)
->add('categories', CollectionType::class, array(
'entry_type' => CategoryType::class,
'error_bubbling' => false,
'constraints' => [
new Valid(),
],
))
->add('submit', SubmitType::class)
;
}
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults(array(
'data_class' => Article::class,
));
}
}

Answer 2

Try setting the error_bubbling option to the collection entries. Not the collection itself. Because the error does not happen to the collection but to the category item in the collection.
$builder
->add('autor', AutorType::class)
->add('categories', CollectionType::class, array(
'entry_type' => CategoryType::class,
'entry_options' => [
'error_bubbling' => false,
],
))
->add('submit', SubmitType::class)
;
Or set it as default in your CategoryType:
// AppBundle\Form\Type\CategoryType.php
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults([
'data_class' => Category::class,
'error_bubbling' => false,
// maybe other options
]);
}