Form collections in SF2 - doctrine-orm

Question

Offers.php
/**
* #var \ZGoffers\MainBundle\Entity\OfferParameter
*
* #ORM\OneToMany(targetEntity="OfferParameter", mappedBy="offer", cascade={"all"})
*/
private $parameters;
OfferParameter.php
/**
* #var \ZGoffers\MainBundle\Entity\Offer
*
* #ORM\ManyToOne(targetEntity="Offer", inversedBy="offer", cascade={"all"})
*/
private $offer;
OfferType.php
class OfferType extends AbstractType
{
public function buildForm(FormBuilder $builder, array $options)
{
$builder
->add('advertiser')
->add('name')
->add('url', 'text', array('label' => 'URL'))
->add('externalUrl', 'text', array('label' => 'External URL'))
->add('dailyCap', 'text', array('label' => 'Daily Cap'))
->add('parameters', 'collection', array(
'type' => new OfferParameterType(),
'allow_add' => true,
'allow_delete' => true
))
->add('active', 'choice', array(
'choices' => array(0 => 'Disabled', 1 => 'Enabled')
));
}
public function getDefaultOptions(array $options)
{
return array(
'data_class' => 'ZGOffers\MainBundle\Entity\Offer'
);
}
}
OfferParameterType.php
class OfferParameterType extends AbstractType
{
public function buildForm(FormBuilder $builder, array $options)
{
$builder
->add('field')
->add('type', 'choice', array(
'choices' => array(
'=' => 'EQUALS',
'>' => 'IS GREATER THAN',
'>=' => 'IS GREATER THAN OR EQUALS',
'<' => 'IS LESS THAN',
'<=' => 'IS GREATER THAN OR EQUALS'
)
))
->add('value');
}
public function getDefaultOptions(array $options)
{
return array(
'data_class' => 'ZGOffers\MainBundle\Entity\OfferParameter'
);
}
}
Form Handling
public function process()
{
if ('POST' == $this->request->getMethod()) {
// bind form data
$this->form->bindRequest($this->request);
// If form is valid
if ($this->form->isValid() && ($offer = $this->form->getData()) instanceof Offer) {
foreach ($offer->getParameters() as $parameter) {
$parameter->setOffer($offer); // THIS SHOULDNT BE NEEDED
}
// save offer to the database
$this->entityManager->persist($offer);
$this->entityManager->flush();
return true;
}
}
return false;
}
My question is.... How the hell do you delete elements in form collections in SF2????
I have multiple forms that are just like this one in my project and it's really putting a halt to development :(
Thanks for all help!

Answer 1

You may need to do something like below :
->add('parameters', 'collection', array(
'type' => new OfferParameterType(),
'allow_add' => true,
'allow_delete' => true,
'attr'=>array('style'=>'display:none;')
))
That makes your whole OfferParameterType collection hidden.
Or in OfferParameterType apply same thing for each field like below :
->add('field',null, array('attr'=>array('style'=>'display:none;')))