How to Dynamically Configure Form Validation Groups

How to Dynamically Configure Form Validation Groups

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:

  1. // src/Validation/ValidationGroupResolver.php
  2. namespace App\Validation;
  4. use Symfony\Component\Form\FormInterface;
  6. class ValidationGroupResolver
  7. {
  8.     private $service1;
  10.     private $service2;
  12.     public function __construct($service1, $service2)
  13.     {
  14.         $this->service1 = $service1;
  15.         $this->service2 = $service2;
  16.     }
  18.     public function __invoke(FormInterface $form): array
  19.     {
  20.         $groups = [];
  22.         // ... determine which groups to apply and return an array
  24.         return $groups;
  25.     }
  26. }

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

  1. // src/Form/MyClassType.php;
  2. namespace App\Form;
  4. use App\Validator\ValidationGroupResolver;
  5. use Symfony\Component\Form\AbstractType;
  6. use Symfony\Component\OptionsResolver\OptionsResolver;
  8. class MyClassType extends AbstractType
  9. {
  10.     private $groupResolver;
  12.     public function __construct(ValidationGroupResolver $groupResolver)
  13.     {
  14.         $this->groupResolver = $groupResolver;
  15.     }
  17.     // ...
  18.     public function configureOptions(OptionsResolver $resolver): void
  19.     {
  20.         $resolver->setDefaults([
  21.             'validation_groups' => $this->groupResolver,
  22.         ]);
  23.     }
  24. }

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.