Using Symfony Form 2.3 in Silex - php

Question

I'm trying to build a Symfony form (in Silex) by name. Using the configuration below, I believe I should be able to call $form = $app['form.factory']->createBuilder('address');, however the FormRegistry cannot find a form of this type.
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\Form\FormTypeExtensionInterface;
class AddressType extends AbstractType implements FormTypeExtensionInterface
{
public function getName()
{
return 'address';
}
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder->add('addressee', 'text');
// .. fields ..
$builder->add('country', 'text');
}
public function getExtendedType()
{
return 'form';
}
}
This is then added to the form registry using the form.type.extensions provider:
$app['form.type.extensions'] = $app->share($app->extend('form.type.extensions', function($extensions) use ($app) {
$extensions[] = new AddressType();
return $extensions;
}));
Is there something else I need to do or a different way of building the form in this way?

Answer 1

Why not use direct
$app['form.factory']->createBuilder('Namespace\\Form\\Types\\Form')

Answer 2

First, sorry for my poor english. :)
I think you should extend form.extensions, instead of form.type.extensions.
Something like this:
$app['form.extensions'] = $app->share($app->extend('form.extensions',
function($extensions) use ($app) {
$extensions[] = new MyTypesExtension();
return $extensions;
}));
Then your class MyTypesExtension should look like this:
use Symfony\Component\Form\AbstractExtension;
class MyTypesExtension extends AbstractExtension
{
protected function loadTypes()
{
return array(
new AddressType(),
//Others custom types...
);
}
}
Now, you can retrieve your custom type this way:
$app['form.factory']->createBuilder('address')->getForm();
Enjoy it!

Answer 3

I see, this question is quite old but:
What you do is creating a new Form Type not extending an existing one, so the correct way to register it to add it to the 'form.types'. (Remember: form type extension is adding something to the existing types so for the future all instance will have that new 'feature'. Here you are creating a custom form type.)
$app['form.types'] = $app->share($app->extend('form.types', function ($types) use ($app) {
$types[] = new AddressType();
return $types;
}));

Answer 4

I think when you are coming from Symfony to Silex form.type.extension can be misleading.
From Symfony How to Create a Form Type Extension:
You want to add a generic feature to several types (such as adding a "help" text to every field type);
You want to add a specific feature to a single type (such as adding a "download" feature to the "file" field type).
So as your code shows you want to add a FormType which exists in Symfony but you would use the FormServiceProvider in Silex without defining an AbstractType and just use the form.factory service as shown in this example:
In your app.php:
use Silex\Provider\FormServiceProvider;
$app->register(new FormServiceProvider());
In your controller/action:
$form = $app['form.factory']->createBuilder('form', $data)
->add('name')
->add('email')
->add('gender', 'choice', array(
'choices' => array(1 => 'male', 2 => 'female'),
'expanded' => true,
))
->getForm()
;