Getting entity in embedded collection of forms - symfony

Question

In my edit form I need to get the entity object in embedded form. This is my main edit form:
class OrderCollectionsEditType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('sampleCollections', CollectionType::class, [
'entry_type' => SampleCollectionType::class,
'allow_add' => true,
'allow_delete' => true,
'by_reference' => false
])
;
}
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults([
'data_class' => Order::class,
]);
}
}
and the embedded one:
class SampleCollectionType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$sampleCollection = $builder->getData();
$builder
->add('methods', EntityType::class, [
'class' => Method::class,
'multiple' => true,
])
{...}
;
}
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults([
'data_class' => SampleCollection::class,
]);
}
}
The form created in controller:
$form = $this->createForm(OrderCollectionsEditType::class, $order);
And the problem is that the $sampleCollection returns NULL, but the form is properly filled by the values. Is there any other way to get the entity object?

Answer 1

The object is passed to the form in the $options['data] property.
Instead of $sampleCollection = $builder->getData(); get it by $sampleCollection = $options['data];

Answer 2

Unfortunately, suggested above $options['data'] doesn't work with CollectionType, there's no 'data' index. After some deeper research I've found the solution, we can use PRE_SET_DATA form event and then get the entity object in listener function.
SOLUTION:
class SampleCollectionType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->addEventListener(FormEvents::PRE_SET_DATA, function (FormEvent $event) {
$sampleCollection = $event->getData();
$form = $event->getForm();
$form->add('methods', EntityType::class, [
'class' => Method::class,
'multiple' => true,
]);
}
;
}
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults([
'data_class' => SampleCollection::class,
]);
}
}