Symfony - Embedded Collection Form validation conditionally - symfony

Question

I have a carousel with a collection of slides (OneToMany) and each slide contain a file that I have to validate if not exist.
When a slide has no file, the field is required but when the file exist, it's not required.
My CarouselType:
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder->add('slides', CollectionType::class, [
'entry_type' => SlideType::class,
'allow_add' => true,
'allow_delete' => true,
'prototype' => true,
'by_reference' => false,
'row_attr' => [
'class' => 'hidden'
]
]);
}
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults([
'data_class' => Carousel::class,
]);
}
My SlideType:
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('title', TextType::class, [
'row_attr' => [
'class' => 'form-group'
],
'attr' => [
'class' => 'form-control'
],
'required' => false
])
->add('url', UrlType::class, [
'row_attr' => [
'class' => 'form-group'
],
'attr' => [
'class' => 'form-control'
],
'required' => false
])
->add('file', FileType::class, [
'row_attr' => [
'class' => 'form-group'
],
'attr' => [
'class' => 'form-control'
],
'required' => false
]);
}
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults([
'data_class' => Slide::class,
'validation_groups' => function (FormInterface $form) {
$data = $form->getData();
if ($data->getFile() === null && $data->getFileName() === null) {
return ['upload'];
}
return ['Default'];
},
]);
}
My Carousel Entity:
/**
* #ORM\Entity(repositoryClass=CarouselRepository::class)
*/
class Carousel
{
/**
* #ORM\Id
* #ORM\GeneratedValue
* #ORM\Column(type="integer")
*/
private $id;
/**
* #ORM\OneToMany(
* targetEntity=Slide::class,
* mappedBy="carousel",
* fetch="EXTRA_LAZY",
* orphanRemoval=true,
* cascade={"persist"}
* )
* #Assert\Count(min=1, minMessage="carousel.slides.count.min")
* #Assert\Valid(groups={"upload"})
*/
private $slides;
...
...
}
My Slide Entity:
/**
* #ORM\Entity(repositoryClass=SlideRepository::class)
*/
class Slide
{
/**
* #ORM\Id
* #ORM\GeneratedValue
* #ORM\Column(type="integer")
*/
private $id;
/**
* #ORM\Column(type="string", length=100, nullable=true)
*/
private $title;
/**
* #ORM\Column(type="string", length=255, nullable=true)
*/
private $url;
/**
* #ORM\Column(type="string", length=255, nullable=true)
*/
private $fileName;
/**
* #var UploadedFile
* #Assert\NotNull(message="slide.file.not_null", groups={"upload"})
*/
protected $file;
/**
* #ORM\ManyToOne(targetEntity=Carousel::class, inversedBy="slides")
* #ORM\JoinColumn(nullable=false)
*/
private $carousel;
...
...
}
I've added validation_groups in my SlideType but it's not working.
What's wrong with my code ?

Answer 1

Use PreSetData Event for adding file in the SlideType
$builder->addEventListener(FormEvents::PRE_SET_DATA, function (FormEvent $event) {
$data = $event->getData();
$isNotRequired = ($data instanceof Slide) && $data->getUrl();
$constraints = isNotRequired ? [] : [new NotBlank()];
$event->getForm()->add('file', FileType::class, [
'row_attr' => [
'class' => 'form-group'
],
'attr' => [
'class' => 'form-control'
],
'required' => !$isNotRequired,
'constraints' => $constraints,
]);
});

Answer 2

You need to use "valid" to validate the subform.
https://symfony.com/doc/current/reference/constraints/Valid.html
$builder->add('slides', CollectionType::class, [
'entry_type' => SlideType::class,
'allow_add' => true,
'allow_delete' => true,
'prototype' => true,
'by_reference' => false,
'row_attr' => [
'class' => 'hidden'
],
'constraints' => [new Valid()],
]);