Symfony2 form entity add other options

Question

I have an entity field, with basic settings, (class and property), and i'd like to add another option like "value not in list", so if is selected, i can trigger something in javascript.

->add('patrol', 'entity', array(

                'class'         => 'InterneStructureBundle:Patrol',
                'property'      => 'name',
                'empty_value'   => 'Choose',
            ))

I didnt find anything appart from "empty_value" which doesnt suits me because you cant trigger anything from it, and choices doesnt seems to work with entity..

Are there any ways to do it ?

Answer 1

You need to add required => false if you want to see empty value:

->add('patrol', 'entity', array(
            'class'         => 'InterneStructureBundle:Patrol',
            'property'      => 'name',
            'required'      => FALSE,
            'empty_value'   => 'Choose',
        ))