Symfony Dynamic Form - Get file from embedded form gives NULL - symfony

Question

I have a dynamic form which display/hide a FileType field depending on another field value (link).
When i'm trying to get the file in my controller, it always gives me NULL
My UserType:
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('familyStatus', ChoiceType::class, [
'label' => 'Statut de famille',
'label_attr' => [
'class' => 'fg-label'
],
'attr' => [
'class' => 'sc-gqjmRU fQXahQ'
],
'required' => true,
'choices' => [
'Married' => 'M',
'Single' => 'S'
]
]);
$formModifier = function (FormInterface $form, $status = null) {
if ($status === 'M') {
$form->add('familyInfo', FamilyInfoType::class);
}
};
$builder->addEventListener(
FormEvents::PRE_SET_DATA,
function (FormEvent $event) use ($formModifier) {
$user = $event->getData();
$formModifier($event->getForm(), $user->getFamilyStatus());
}
);
$builder->get('familyStatus')->addEventListener(
FormEvents::POST_SUBMIT,
function (FormEvent $event) use ($formModifier) {
$status = $event->getForm()->getData();
$formModifier($event->getForm()->getParent(), $status);
}
);
}
My FamilyInfoType:
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('partnerName', TextType::class, [
'label' => 'Nom du partenaire',
'label_attr' => [
'class' => 'fg-label'
],
'attr' => [
'class' => 'sc-gqjmRU fQXahQ'
],
'required' => true
])
->add('weddingProof', FileType::class, [
'label' => 'Acte de mariage',
'label_attr' => [
'class' => 'Upload-label'
],
'attr' => [
'class' => 'Upload-input',
'maxsize' =>'4M',
'accept' =>'image/*'
],
'required' => false,
'mapped' => false
]);
}
My UserController:
/**
* #Route("/user", name="add_user", methods={"GET", "POST"})
* #param Request $request
*/
public function addUser(Request $request) {
$response = [];
$user = new User();
$form = $this->createForm(UserType::class, $user);
$form->handleRequest($request);
if ($form->isSubmitted() && $form->isValid()) {
if ($user->getFamilyStatus() === 'M') {
var_dump("ok");
$document = $form->get('familyInfo')->get('weddingProof')->getData();
$partnerName = $form->get('familyInfo')->get('partnerName')->getData();
var_dump($document); // NULL
var_dump($partnerName); // OK the value is displayed
die;
}
}
return $this->render("user/registration.html.twig", ['form' => $form->createView()]);
}
It's working with TextType field but not with FileType. What's wrong with my form.

Answer 1

The issue is with the mapped => false option to the file type. The form is not setting the uploaded file object in the property of your entity because it’s not mapped.