Validation Groups

If your object takes advantage of validation groups, you'll need to specify which validation group(s) your form should use:

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$form = $this->createFormBuilder($user, [
    'validation_groups' => ['registration'],
])->add(...);

If you're creating form classes (a good practice), then you'll need to add the following to the configureOptions() method:

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use Symfony\Component\OptionsResolver\OptionsResolver;

public function configureOptions(OptionsResolver $resolver)
{
    $resolver->setDefaults([
        'validation_groups' => ['registration'],
    ]);
}

In both of these cases, only the registration validation group will be used to validate the underlying object. To apply the registration group and all constraints that are not in a group, use:

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'validation_groups' => ['Default', 'registration']