Symfony2 Sonata Admin show attribute only as a readyonly text

Question

I have some immutable attributes on my entity to administrate with sonata-admin bundle.

I want to show them in the edit-view of the entity, but don\'t want to provide an

Answer 1

$formMapper
    ->add('post', 'entity', 
        array(
            'label' => 'Some post',
            'read_only' => true,
            'disabled'  => true,
            'class' => 'Acme\DemoBundle\Entity\Post'
        )
    )
;