class SurveyType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('title', TextareaType::class)
            ->add('options', CollectionType::class, [
                'entry_type' => SurveyOptionType::class,
                'entry_options' => ['label' => false],
                'allow_add' => true,
                'by_reference' => false,
            ])
            ->add('save', SubmitType::class, ['label' => 'Submit'])
        ;
    }

    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults([
            'data_class' => Survey::class,
        ]);
    }
}