Silex/Symfony Form - form_errors(form) doesn't work in twig - symfony-forms

Question

I think this is a easy one.
I have a Silex application, with Symfony Form (with Validator).
This is a portion of my form:
return $this->factory->createBuilder(FormType::class)
->add('holidayId', HiddenType::class, array())
->add('firstName', TextType::class, array(
'label' => 'Il tuo nome'
))
->add('lastName', TextType::class, array(
'label' => 'Il tuo cognome'
))
->add('email', EmailType::class, array(
'label' => 'La tua email',
'constraints' => array(
new Assert\NotBlank(),
new Assert\Email()
),
'invalid_message' => 'Indirizzo email non valido',
))
->add('phone', TextType::class, array(
'label' => 'Cellulare',
'constraints' => array(
new Assert\NotBlank(),
new Assert\Regex("/[\d\-\ ]+/"),
new Assert\Length(array('min' => 5, 'max'=>20))
)
))
->add('city', ChoiceType::class, array(
'placeholder' => 'Seleziona una città',
'choices' => $cities,
))
->add('age', NumberType::class, array(
'label' => 'Età',
'constraints' => array(
new Assert\NotBlank(),
new Assert\Range(array('min'=>18, 'max'=>100))
)
))
->add('gender', ChoiceType::class, array(
'label' => 'Sesso',
'choices' => array(
'Uomo' => 0,
'Donna' => 1
),
'expanded' => true,
'constraints' => array(
new Assert\NotBlank(),
new Assert\Choice(array(0, 1))
)
))
->add('privacy', ChoiceType::class, array(
'choices' => array(
'Dichiaro di aver preso visione della privacy policy e autorizzo il trattamento dei dati personali per le finalità di cui ai punti a) b) c) della stessa.' => 1,
),
'expanded' => true,
'multiple' => true
))
->add('marketing', ChoiceType::class, array(
'choices' => array(
'Presto il consenso per l’utilizzo e la comunicazione dei miei dati a terzi da parte di P&R Eventi e Vacanze s.r.l. per finalità promozionali relative ai servizi turistici e per la ricezione di offerte commerciali.' => 1,
),
'expanded' => true,
'multiple' => true,
'required' => false
))
->add('send', SubmitType::class, array(
'label' => 'INVIA RICHIESTA',
'attr' => array('class' => 'btn btn-corporate btn-lg btn-block'),
))
->getForm();
Which returns an instance of Form.
On my controller I have:
$form = $requestType->getForm();
$form->handleRequest($request);
if($form->isValid()){
$data = $form->getData();
// .....
return $app->redirect('/thank-you');
}
The validation works fine, it redirects me when the form is valid.
On my twig view I render the form:
{{ form_start(form) }}
{{ form_errors(form) }}
<div class="form-group">
{{ form_label(form.firstName) }}
{{ form_widget(form.firstName, {'attr': {'class': 'form-control'}}) }}
</div>
<div class="form-group">
{{ form_label(form.lastName) }}
{{ form_widget(form.lastName, {'attr': {'class': 'form-control'}}) }}
</div>
<div class="form-group">
{{ form_label(form.email) }}
{{ form_widget(form.email, {'attr': {'class': 'form-control'}}) }}
</div>
...
The form_errors method doesn't show anything if the form isn't valid. Is ever BLANK ....
What's wrong?
Thank you in advance!
M.

Answer 1

I think that form doesn't contain childs errors by default
Add errors output for each element
<div class="form-group">
{{ form_label(form.firstName) }}
{{ form_errors(form.firstName) }}
{{ form_widget(form.firstName, {'attr': {'class': 'form-control'}}) }}
</div>
Or add special type for this form and change builder to pass all errors to view
namespace Form;
class Edit extends AbstractType
{
public function buildView(FormView $view, FormInterface $form, array $options)
{
parent::buildView($view, $form, $options);
$view->vars = array_replace($view->vars, array(
'errors' => $form->getErrors(true)
));
}
public function buildForm(FormBuilderInterface $builder, array $options)
{
parent::buildForm($builder, $options);
$builder
->add('holidayId', HiddenType::class, array())
->add('firstName', TextType::class, array(
'label' => 'Il tuo nome'
))
...
}
}
....
$form = $app['form.factory']->create(\Form\Edit::class, [], []);