Transform forms from Symfony2 to Symfony3 - forms

Question

I want to transform a form like this to comply with Symfony3 code :
$form = $this->createForm(new AjoutQC(array('idcolle' => $idColle,'idqc' => $question->getId())),
$question,
array('action' => $this->generateUrl('paces_colle_qc_update',
array(
'id' => $question->getId(),
'idColle' => $idColle,
'idTuteur' => $idTuteur)
),
'method' => 'PUT',
));
$form->add('submit', SubmitType::class, array('label' => 'Sauvegarder'));
Symfony3 asks for something like :
AjoutQC::class
instead of :
new AjoutQC...
I didn't find anything about it after some research.

Answer 1

Check these upgrade notes for forms.
It says:
Passing type instances to Form::add(), FormBuilder::add() and the FormFactory::create*() methods is not supported anymore. Pass the fully-qualified class name of the type instead.
Before:
$form = $this->createForm(new MyType());
After:
$form = $this->createForm(MyType::class);
You can use OptionsResolver and pass your data array('idcolle' => $idColle,'idqc' => $question->getId()) that you are currently passing to your form type as a third argument to createForm method:
$form = $this->createForm(AjoutQC::class, $question, array(
'action' => $this->generateUrl('paces_colle_qc_update', array(
'id' => $question->getId(),
'idColle' => $idColle,
'idTuteur' => $idTuteur,
)),
'method' => 'PUT',
'idcolle' => $idColle,
'idqc' => $question->getId(),
));
Then in your AjoutQC type you need to do something like:
use Symfony\Component\OptionsResolver\OptionsResolver;
// ..
public function buildForm(FormBuilderInterface $builder, array $options)
{
$this->idcolle = $options['idcolle'];
$this->idqc = $options['idqc'];
$builder
->add(...)
// ..
;
}
// ..
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setRequired(array('idcolle', 'idqc'));
}
This will set idcolle, idqc options as required, that must be passed to your form type (AjoutQC).

Answer 2

In Symfony 3 you need to use FQCN (fully-qualified class name) instead of an instance of the form (or a string reference to a service).
$form = $this->createForm(
AjoutQC::class,
$question,
array(
'action' => $this->generateUrl(
'paces_colle_qc_update',
array(
'id' => $question->getId(),
'idColle' => $idColle,
'idTuteur' => $idTuteur
)
),
'method' => 'PUT',
'idColle' => $idColle,
'idQc' => $question->getId()
)
)
In your AjoutQC class you need to go to your configureOptions method and add the idcolle and idqc options:
class AjoutQC extends AbstractType {
/**
* #param OptionsResolver $resolver
*/
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setRequired(array('idColle','idQc'));
$resolver->setDefaults(
array(
'data_class' => 'Your\Entity\Path',
'idColle' => null,
'idQc' => null
)
);
}
}

Answer 3

If you are just wondering about the ::class notation, you can find information about that here: http://php.net/manual/en/language.oop5.basic.php#language.oop5.basic.class.class
::class requires php >= 5.5
If you are using <5.5 you can just simply use the FQCN e.g. MyLong\Namespace\Fully\Qualified\ClassNameType