get name of css ID in a form in twig

Question

I'm building a form in my sf2 project,so to provide a input I do in twig :

{{ form_widget(form.price)  }}

the output is:

<input type="checkbox" value="1" required="required" 
       name="mybundle_appbundle_producttype[price]"
         id="mybundle_appbundle_producttype_price">

My question is: How to get the name or content of "id" only mybundle_appbundle_producttype_price in twig?

Because for every field I'll use the CSS id in Javascript code.

Answer 1

You can get all possible params with {{ dump(form.price) }}. If I remember correctly id accessable via {{ form.price.vars.id }}