Description
Hi,
Currently it's possible to create and populate fields based on an other one by using Listeners as in sample http://symfony.com/doc/current/cookbook/form/dynamic_form_modification.html#dynamic-generation-for-submitted-forms
But I seems to be not possible to make the field depend on multiple fields. For example, I would like to populate a list of available rooms depending on the type of room, start date and end date.
I tried by adding the following listener:
$formModifier = function (FormInterface $form, RoomType $roomType = null, \DateTime $startTime = null, \DateTime $endTime = null) {
$roomTypeId = ($roomType !== null) ? $roomType->getId() : null;
$hallConfigurations = $this->entityManager->getRepository('PTCNoventoBundle:HallConfiguration')
->getAllAvailableForCriteria($roomTypeId, $startTime, $endTime);
$form->add('hallConfiguration', 'entity', array(
'label' => 'hall',
'choices' => $hallConfigurations,
'class' => 'PTCNoventoBundle:HallConfiguration',
));
};
$builder->get('roomType')->addEventListener(
FormEvents::POST_SUBMIT,
function (FormEvent $event) use ($formModifier) {
$roomType = $event->getForm()->getData();
$startTime = $event->getForm()->getParent()->getData()->getStartTime(); // <- null
$endTime = $event->getForm()->getParent()->getData()->getEndTime(); // <- null
$formModifier($event->getForm()->getParent(), $roomType, $startTime, $endTime)
}
);As you can see $startDate and $endDate are null at this time (not yet bound in the root form, I think). So I also tried to create a POST_SUBMIT listener attached to the root form but I have an error because I can't create new field on POST_SUBMIT at root form level.
If I replace the listener on roomType by a listener with SUBMIT EVENT at root level, I get always null in hallConfiguration (because the field was bound before).
$builder->addEventListener(
FormEvents::SUBMIT,
function (FormEvent $event) use ($formModifier) {
$roomType = $event->getForm()->get('roomType')->getData(); // <- ok - RoomType object
$startTime = $event->getForm()->get('startTime')->getData(); // <- ok - DateTime object
$endTime = $event->getForm()->get('endTime')->getData(); // <- ok - DateTime object
$formModifier($event->getForm(), $roomType, $startTime, $endTime);
$this->logger->info(print_r($event->getData()->getHallConfiguration(), true)); // <- null
}
);It would be interesting to be able to support dynamic form with multiple dependent fields as in my sample.
@webmozart Any ideas on this possible feature ?