Symfony2 Conditional Validation - symfony

Question

I have a FormType method.
<?php
class PostType extends AbstractType
{
/**
* #param FormBuilderInterface $builder
* #param array $options
*/
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('title')
->add('text')
->add('paymentMethod', 'choice', array(
'required' => true,
'choices' => array(
'cach' => 'Cach',
'check'=> 'Check'
)
))
->add('checkId', 'integer', array(
'required' => true
))
->add('submit', 'submit');
}
/**
* #param OptionsResolverInterface $resolver
*/
public function setDefaultOptions(OptionsResolverInterface $resolver)
{
$resolver->setDefaults([
'data_class' => 'AppBundle\Entity\Post',
]);
}
/**
* #return string
*/
public function getName()
{
return 'appbundle_post';
}
}
?>
The field checkId is displaying only when the choice 'check' is selected with the field paymentMethod.
Here is the javascript:
PaymentMethod = {
hideCheckId: function(){
$('.check-id').hide();
},
showCheckId: function(){
$('.check-id').fadeIn();
},
whenPaymentMethodChange: function(){
$('#appbundle_post_paymentMethod').on('change', function(){
var method = this.value ;
if(method == 'check'){
PaymentMethod.showCheckId();
}else{
PaymentMethod.hideCheckId();
}
})
}
};
PaymentMethod.hideCheckId();
PaymentMethod.whenPaymentMethodChange();
I would like the field 'checkId' to be required to TRUE only when the option check is selected.
How can I do that?

Answer 1

Ok thanks, Here is the solution for everyone:
Add a callback method function in your entity class.
/**
* #param ExecutionContextInterface $context
* #Assert\Callback()
*/
public function isPaymentIsCheck(ExecutionContextInterface $context)
{
if ($this->getPaymentMethod() == 'check' and $this->getCheckId() == '') {
$context->buildViolation('A check ID as to be defined')
->atPath('checkID')
->addViolation();
}
}
Don't forget to add the Assert and ExecutionContextInterface component in you entity class:
use Symfony\Component\Validator\Constraints as Assert;
use Symfony\Component\Validator\Context\ExecutionContextInterface;
And finally don't forget to display errors in the twig template:
{% if form.vars.errors|length %}
<div class="alert alert-danger">{{ form_errors(form) }}</div>
{% endif %}
Hope it will help you.
More info here: http://symfony.com/doc/current/reference/constraints/Callback.html

Answer 2

What KevinR wrote would definitely solve your problem, but in my opinion there's even cleaner solution:
http://symfony.com/doc/current/book/validation.html#group-sequence-providers
Imagine a User entity which can be a normal
user or a premium user. When it's a premium user, some extra
constraints should be added to the user entity (e.g. the credit card
details). To dynamically determine which groups should be activated,
you can create a Group Sequence Provider. First, create the entity and
a new constraint group called Premium:
This is exactly your how you would solve this kinda of problem
public function getGroupSequence()
{
$groups = array('Post'); //Or array('Default') whichever you prefer
if ($this->getPaymentMethod() === 'Check') {
$groups[] = 'Check';
}
return $groups;
}
Of course you'll have to add validation group paymentMethod property in your entity mapping. Here's annotation example, for more examples check above link.
/**
* #Assert\IsTrue(groups={"Check"})
*/
private $checkId;