Symfony2 - FormBuilder - add a class to the field and input

Question

I want to add a class to certain input or label elements in a Symfony application.

I can do something like this in a form on the Twig level:

<div class="row">
    {{ form_label(form.subject) }}
    {{ form_widget(form.subject, { 'attr': {'class': 'c4'} }) }}
</div>

This works fine. But I have to setup and write out the whole template for every form manually. And I actually want to use:

{{ form_widget(form) }}

So, I was thinking, how could I add a CSS class for a label or an input somewhere in the FormType:

class SystemNotificationType extends AbstractType {
    public function buildForm(FormBuilder $builder, array $options) {
        $builder->add('subject', 'text', array(
            'label' => 'Subject'
        ));

I think this might be more useful, as you can configure the whole form in one place.

How can this be done? Maybe I'm thinking about it the wrong way.

Answer 1

You can do it like this:

class SystemNotificationType extends AbstractType {
    public function buildForm(FormBuilder $builder, array $options) {
        $builder->add('subject', 'text', array( 
            'label'  => 'Subject',
            'attr'   =>  array(
                'class'   => 'c4')
            )
        );
    }
}