How to set choice values in twig?

[dialogik]

I am using a ChoiceType in a Symfony3 form type

$builder
    ->add('confirmation', ChoiceType::class, array(
        'choices'  => array(
            'Maybe' => null,
            'Yes' => true,
            'No' => false,
        )
))

Now I want to set choices dynamically in twig. I would assume to go like this

{{ form_widget(field.type, {'choices': {'foo': true, 'bar': false}}) }}

but that throws error

Impossible to access an attribute ("attr") on a boolean variable ("1") in form_div_layout.html.twig at line 82

Is there any way to set choices in twig (while rendering the form field using form_widget() or form_row())?

[stof]

no you cannot, because choices impact the building of the form. They are not passed as is to the template (they main goal of the Form component is not to handle the rendering, but to handle the form binding)

[javiereguiluz]

Closing this issue because, apparently, this "limitation" is instead a "feature".