Validate a non-model attribute - symfony

Question

Env: Symfony2.2 + Propel 1.6
I try to validate a 'customer' form which is linked to the model (Customer) to manage a "create account" (form 1) and a "login account" (form 2). The user is required to check the "I accept the terms of agreement" checkbox and this field is not linked to the model. I'm using a global "validation.yml" file to manage validation rules.
I don't know how to validate the checkbox is checked with the validation.yml file.
I've try several technics:
1/ Put a rule in the validation.yml and add getter/setter in the model:
validation.yml:
MyProject\Model\Customer:
properties:
email:
- NotBlank:
groups: [login, create]
message: Champ obligatoire.
- Email:
groups: [login, create]
message: La valeur saisie doit être un email.
cgv:
- Symfony\Component\Validator\Constraints\True:
groups: [login, create]
message: Vous devez accepter les CGV.
constraints:
- Propel\PropelBundle\Validator\Constraints\UniqueObject:
groups: [create]
fields: email
message: Cet email est déjà inscrit.
- Callback:
groups: [login]
methods:
- [MyProject\Model\CustomerQuery, isCustomerEmail]
MyProject\Model\Customer:
class Customer extends BaseCustomer {
private $cgv;
(...)
public function setCgv($cgv) {
$this->cgv = (Boolean) $cgv;
}
public function getCgv() {
return $this->cgv;
}
}
Result: the rule "True" is ok even if the checkbox isn't checked. If I add a "NotBlank" rule, the validation failed in both check/uncheck cases.
2/ Try to add specific validation rules in the "CustomerType" object (like explained in this article)
/*
*
*
* #author
*/
class CustomerLoginType extends AbstractType {
/**
*
* #param \Symfony\Component\Form\FormBuilderInterface $builder
* #param array $options
*/
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder->add('email', 'text', array('required' => true));
$builder->add('fill', 'checkbox', array('mapped' => false, 'required' => false, 'data' => true));
$builder->add('cgv', 'checkbox', array('data' => true, 'mapped' => false, 'required' => true, 'validation_groups' => array('login'), 'constraints' => new True(array('message' => 'Vous devez accepter les Conditions Générales de Vente.'))));
}
/**
*
* #return string
*/
public function getName()
{
return 'customer_login';
}
/**
*
* #param \MyProject\FrontBundle\Form\Type\OptionsResolverInterface $resolver
*/
public function setDefaultOptions(OptionsResolverInterface $resolver)
{
$resolver->setDefaults(array(
'data_class' => 'MyProject\Model\Customer',
'validation_groups' => array('login')
));
}
}
Result: Theses rules are not take into account if a "validation.yml" file exists, it could work if I remove the "Customer" entry in the file, but I would prefer to keep it if possible.
3/ As I can't find a "yml" solution, I've finally add a "manual" validation inside the controller like this:
$form_request = $this->getRequest()->get('customer_login');
if (!isset($form_request['cgv'])) {
$form_customer_login->get('cgv')->addError(new \Symfony\Component\Form\FormError('Vous devez accepter les Conditions Générales de Vente.'));
}
Any idea of how I could add my "accept terms" checkbox rule inside the validation.yml file?