Passing data to buildForm() in Symfony 2.8, 3.0 and above

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This broke some of our forms as well. I fixed it by passing the custom data through the options resolver.

In your form type:

public function buildForm(FormBuilderInterface $builder, array $options)
{
    $this->traitChoices = $options['trait_choices'];

    $builder
        ...
        ->add('figure_type', ChoiceType::class, [
            'choices' => $this->traitChoices,
        ])
        ...
    ;
}

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

Then when you create the form in your controller, pass it in as an option instead of in the constructor:

$form = $this->createForm(ProfileEditType::class, $profile, [
    'trait_choices' => $traitChoices,
]);

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