How to Choose Validation Groups Based on the Submitted Data

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If you need some advanced logic to determine the validation groups (e.g. based on submitted data), you can set the validation_groups option to an array callback:

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use App\Entity\Client;
use Symfony\Component\OptionsResolver\OptionsResolver;

// ...
public function configureOptions(OptionsResolver $resolver): void
{
    $resolver->setDefaults([
        'validation_groups' => [
            Client::class,
            'determineValidationGroups',
        ],
    ]);
}

This will call the static method determineValidationGroups() on the Client class after the form is submitted, but before validation is invoked. The Form object is passed as an argument to that method (see next example). You can also define whole logic inline by using a Closure:

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use App\Entity\Client;
use Symfony\Component\Form\FormInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;

// ...
public function configureOptions(OptionsResolver $resolver): void
{
    $resolver->setDefaults([
        'validation_groups' => function (FormInterface $form): array {
            $data = $form->getData();

            if (Client::TYPE_PERSON == $data->getType()) {
                return ['person'];
            }

            return ['company'];
        },
    ]);
}

Using the validation_groups option overrides the default validation group which is being used. If you want to validate the default constraints of the entity as well you have to adjust the option as follows:

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use App\Entity\Client;
use Symfony\Component\Form\FormInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;

// ...
public function configureOptions(OptionsResolver $resolver): void
{
    $resolver->setDefaults([
        'validation_groups' => function (FormInterface $form): array {
            $data = $form->getData();

            if (Client::TYPE_PERSON == $data->getType()) {
                return ['Default', 'person'];
            }

            return ['Default', 'company'];
        },
    ]);
}

You can find more information about how the validation groups and the default constraints work in the article about validation groups.

This work, including the code samples, is licensed under a Creative Commons BY-SA 3.0 license.
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