Symfony嵌入式表格条件验证

Question

I have a form which contains three objects:

$builder
    ->add('customer', new CustomerType())
    ->add('shippingAddress', new AddressType())
    ->add('billingAddress', new AddressType())
    ->add('sameAsShipping', 'checkbox', ['mapped' => false])
;

Each of the embedded forms has their own validation constraints and they work. In my main form, I have cascade_validation => true so that all of the embedded form validation constraints are applied. This also works.

I am having trouble 'disabling' the validation on the billingAddress form if the sameAsShipping checkbox is enabled. I can't make the validation in the AddressType form conditional because it always needs to be enforced for the shippingAddress form.

Answer 1

I've solved this same problem by using validation groups.

First, this is important: use the validation_groups option in your AddressType to set the validation groups of every constraint of each field in the type:

<?php

use Symfony\Component\Validator\Constraints as Assert;
use Symfony\Component\Form\FormBuilderInterface;

class AddressType extends \Symfony\Component\Form\AbstractType
{
    function buildForm(FormBuilderInterface $builder, array $options)
    {
        $groups = $options['validation_groups'];

        $builder->add('firstName', 'text', ['constraints' => new Assert\NotBlank(['groups' => $groups])]);
        $builder->add('lastName', 'text', ['constraints' => new Assert\NotBlank(['groups' => $groups])]);
    }
}

Then, in the parent form pass different validation groups to the two fields:

<?php

$formBuilder = $this->get('form.factory')
    ->createNamedBuilder('checkout', 'form', null, [
        'cascade_validation' => true,
    ])
    ->add('billingAddress', 'address', [
        'validation_groups' => 'billingAddress'
    ])
    ->add('shippingAddress', 'address', [
        'validation_groups' => 'shippingAddress'
    ]);

Then, determine determine your validation groups by looking at the value of the checkbox.

if ($request->request->get('sameAsShipping')) {
    $checkoutValidationGroups = ['Default', 'billingAddress'];
} else {
    $checkoutValidationGroups = ['Default', 'billingAddress', 'shippingAddress'];
}

You can then validate only either the billingAddress or the shippingAddress, or both using the validation group mechanism.

I chose to use a button:

$formBuilder->add('submitButton', 'submit', ['validation_groups' => $checkoutValidationGroups]);