Symfony2: How to get action name in form class - php

Question

My form is on the base of self-referenced entity (category have parent category)
For the parent field, I want to have different query_builder function depending of action name. When action is update, parent field (drop-down list) contains all categories, excepting edited category. This is work good. But, when action is Create new, parent form field contains only null value (in my case Main category).
This is category form class
CategoryType class:
namespace Dimas\CatalogBundle\Form;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolverInterface;
use Doctrine\ORM\EntityRepository;
class CategoryType extends AbstractType {
/**
* #param FormBuilderInterface $builder
* #param array $options
*/
public function buildForm(FormBuilderInterface $builder, array $options) {
$builder
->add('name')
->add('parent', 'entity', array(
'label' => 'Parent Category ',
'empty_value' => '- Main level -',
'class' => 'DimasCatalogBundle:Category', 'property' => 'getTreeName',
'required' => false,
'query_builder' => function(EntityRepository $er) use ($options) {
$er->createQueryBuilder('u');
//need only if action is 'update'
$er->where('u.id <> :selfId');
$er->setParameter(':selfId', $options['data']->getId());
// end if
return $er;
},
));
}
/**
* #param OptionsResolverInterface $resolver
*/
public function setDefaultOptions(OptionsResolverInterface $resolver) {
$resolver->setDefaults(array(
'data_class' => 'Dimas\CatalogBundle\Entity\Category'
));
}
/**
* #return string
*/
public function getName() {
return 'dimas_catalogbundle_category';
}
}
Is it a good idea to add if in query_builder? How to get action name?
$options array contains action name, but it is so deep inside.

Answer 1

Pass in an option into the builder from your controller action that can act as a conditional:
/**
* #param FormBuilderInterface $builder
* #param array $options
*/
public function buildForm(FormBuilderInterface $builder, array $options)
{
if ($options['action'] === 'update') {
$callable = function (EntityRepository $er)...
} elseif ($option['action'] === 'Create new') {
$callable = function (EntityRepository $er) ...
}
...
'required' => false,
'query_builder' => $callable,
}
public function setDefaultOptions(OptionsResolverInterface $resolver) {
$resolver
->setDefaults(array(
'data_class' => 'Dimas\CatalogBundle\Entity\Category'
))
->setRequired(['action'])
;
}
// Your controller
public function createNewAction(Request $request)
{
$form = $this->createForm(new CategoryType(), $category, ['action' => 'Create new']);
}
public function updateAction(Request $request)
{
$form = $this->createForm(new CategoryType(), $category, ['action' => 'update']);
}

Answer 2

I achieve result this way:
I use EventListener to my form class. Learned from cookbook
Now my builForm function in CategoryType class looks like that:
public function buildForm(FormBuilderInterface $builder, array $options) {
$builder->add('name');
$builder->addEventListener(FormEvents::PRE_SET_DATA,
function (FormEvent $event) use ($options) {
$category = $event->getData();
$form = $event->getForm();
// check if the Category object is "new"
// If no data is passed to the form, the data is "null".
// This should be considered a new "Category"
if (!$category || null === $category->getId()) {
$form->add('parent', 'entity', array(
'label' => 'Parent Category ',
'empty_value' => '- Main level -',
'class' => 'DimasCatalogBundle:Category', 'property' => 'getTreeName',
'required' => false,
'query_builder' => function(EntityRepository $er) use ($options) {
return $er->createQueryBuilder('u');
},
));
} else {
$form->add('parent', 'entity', array(
'label' => 'Parent Category ',
'empty_value' => '- Main level -',
'class' => 'DimasCatalogBundle:Category', 'property' => 'getTreeName',
'required' => false,
'query_builder' => function(EntityRepository $er) use ($options) {
return $er->createQueryBuilder('u')
->where('u.id <> :selfId')
->setParameter(':selfId', $options['data']->getId());
},
));
}
});
}
I did not get action (but I still wont).