How to Dynamically Configure Form Validation Groups

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Sometimes you need advanced logic to determine the validation groups. If they can't be determined by a callback, you can use a service. Create a service that implements __invoke() which accepts a FormInterface as a parameter:

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        // src/Validation/ValidationGroupResolver.php
namespace App\Validation;

use Symfony\Component\Form\FormInterface;

class ValidationGroupResolver
{
    public function __construct(
        private object $service1,
        private object $service2,
    ) {
    }

    public function __invoke(FormInterface $form): array
    {
        $groups = [];

        // ... determine which groups to apply and return an array

        return $groups;
    }
}
    

Then in your form, inject the resolver and set it as the validation_groups:

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        // src/Form/MyClassType.php;
namespace App\Form;

use App\Validation\ValidationGroupResolver;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\OptionsResolver\OptionsResolver;

class MyClassType extends AbstractType
{
    public function __construct(
        private ValidationGroupResolver $groupResolver,
    ) {
    }

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

This will result in the form validator invoking your group resolver to set the validation groups returned when validating.

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

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