Symfony2 DataTransformer after handleRequest - php

Question

I have an API and I am sending a reference of an entity, I'm using a DataTransformer to get my entity but the DataTransformer is always called before the $form->handleRequest($request) the value is always null and it could't works
My Controller
public function newAction(Request $request)
{
$orderNewFormType = $this->get('competitive_bo.api_bundle.form.type.order_new');
$card = new Card();
try {
$form = $this->createForm($orderNewFormType, $card);
$form->handleRequest($request);
} catch (TransformationFailedException $e) {
return $this->notFoundErrorResponse(
'Business not found'
);
}
if ($form->isValid()) {
return $this->okResponse(array());
}
$validatorErrorFormatter = $this->get('competitive_bo.api_bundle.formatter.validator_error');
$errors = $validatorErrorFormatter->formatFromFormError($form->getErrors(true));
return $this->badRequestErrorResponse(
'Invalid data',
$errors
);
}
The form type
class OrderNewFormType extends AbstractType
{
/**
* {#inheritdoc}
*/
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('name')
->add('customer', 'entity', array(
'class' => 'CompetitiveBOBusinessBundle:Customer',
'property' => 'id'
))
->add('business', 'business', array(
'mapped' => false,
))
;
}
/**
* {#inheritdoc}
*/
public function setDefaultOptions(OptionsResolverInterface $resolver)
{
$resolver->setDefaults(array(
'csrf_protection' => false,
'data_class' => Card::class
));
}
public function getName()
{
return null;
}
}
The Business form type
class BusinessReferenceFormType extends AbstractType
{
/**
* #var ReferenceToBusinessTransformer
*/
private $referenceToBusinessTransformer;
public function __construct(ReferenceToBusinessTransformer $referenceToBusinessTransformer)
{
$this->referenceToBusinessTransformer = $referenceToBusinessTransformer;
}
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder->addViewTransformer($this->referenceToBusinessTransformer);
}
public function getName()
{
return 'business';
}
public function getParent()
{
return 'text';
}
}
And the DataTransformer
/**
* Class ReferenceToBusinessTransformer
*/
class ReferenceToBusinessTransformer implements DataTransformerInterface
{
/**
* #var BusinessRepository
*/
private $businessRepository;
public function __construct(BusinessRepository $businessRepository)
{
$this->businessRepository = $businessRepository;
}
/**
* {#inheritdoc}
*/
public function transform($reference)
{
var_dump($reference);
$business = $this->businessRepository->findOneBy(array(
'reference' => $reference
));
if (null === $business) {
throw new TransformationFailedException;
}
return $business;
}
/**
* {#inheritdoc}
*/
public function reverseTransform($value)
{
if (!($value instanceof Business)) {
throw new TransformationFailedException;
}
return $value->getReference();
}
}
The var_dump($reference) is always null
And I have my test
public function testNewAction($getParams, $postParam, $responseCode)
{
$client = static::createClient();
$router = $client->getContainer()->get('router');
$route = $router->generate('competitivebo_api_order_new',$getParams);
$client->request('POST', $route, $postParam);
$response = $client->getResponse();
$this->assertJsonResponse($response, $responseCode);
}
With the post params
'customer' => 1,
'business' => LoadBusinessData::REFERENCE_1,
'name' => 'Test',
The exception TransformationFailedException is always thrown during the $this->createForm(...) so the request is not handled

Answer 1

According with the documentation,
When null is passed to the transform() method, your transformer should return an equivalent value of the type it is transforming to (e.g. an empty string, 0 for integers or 0.0 for floats).