symfony-forms Forms How to deal with form options

Example

In this example, I created a form which is used to register a new user. In the options passed to the form, I give the different roles a user can have.

Creating a reusable class for my form with configured data class and an extra option that fills the choice field to pick a userrole:

class UserType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('firstName', TextType::class, array(
                'label' => 'First name'
            ))
            ->add('lastName', TextType::class, array(
                'label' => 'Last name'
            ))
            ->add('email', EmailType::class, array(
                'label' => 'Email'
            ))
            ->add('role', ChoiceType::class, array(
                'label' => 'Userrole',
                'choices' => $options['rolechoices']
            ))
            ->add('plain_password', RepeatedType::class, array(
                'type' => PasswordType::class,
                'first_options' => array('label' => 'Password'),
                'second_options' => array('label' => 'Repeat password')
            ))
            ->add('submit', SubmitType::class, array(
                'label' => 'Register user'
            ));
    }

    public function configureOptions(OptionsResolver $optionsResolver)
    {
        $optionsResolver->setDefaults(array(
            'data_class' => 'WebsiteBundle\Entity\User',
            'rolechoices' => array()
        ));
    }
}

As you can see, there's a default option added to the form named 'roleChoises'. This option is created and passed in the method to create a form object. See next code.

Creating a form-object in my controller:

$user = new User();
$roles = array(
    'Admin' => User::ADMIN_ROLE,
    'User' => User::USER_ROLE
);
$form = $this->createForm(UserType::class, $user, array(
    'rolechoices' => $roles
));