Not to validate the form in Symfony 2 - forms

Question

Here is my form, I build in the controller:
$defaulData = ....
$formBuilder = $this->createFormBuilder($defaultData);
$entity_options = array(
'class' => 'MyBundle:Param',
'property' => 'description',
'query_builder' => function(EntityRepository $er) {
return $er->getParamsFromCategorieQueryBuilder(MyController::$category_for_list);
},
'label' => 'Donnée à afficher'
);
$formBuilder
->add('entity_types', 'entity', $entity_options);
The form is a list of Param objects, it displays good but for some reason, when I submit the form, I have an error on entity_types field saying that the value cannot be blank though there is one Param selected (even by default).
So I was wondering if I could disable validation.
When whould I put this validation_groups to false ? if it is in $entity_options, I tried it already and it does not work.
ty

Answer 1

You should modify you options like this (both require and groups are needed):
$entity_options = array(
'class' => 'MyBundle:Param',
'property' => 'description',
'query_builder' => function(EntityRepository $er) {
return $er->getParamsFromCategorieQueryBuilder(MyController::$category_for_list);
},
'required' => false,
'validation_groups' => false,
'label' => 'Donnée à afficher'
);
If the error is instead on the Form class itself, you should change in:
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults(array(
'validation_groups' => false,
));
}

Answer 2

The way to prevent validation for good is this one :
$formBuilder->addEventListener(FormEvents::POST_SUBMIT, function (FormEvent $event) {
$event->stopPropagation();
}, 900);
It prevents from calling the validation event.
The solution that giosh94mhz gave me what not good because even with validation_group = false some validation are still done.