Radio buttons for boolean field, how to do a “false”?

Question

I am currently trying to insert some simple true/false radio buttons in Rails 3, but I can\'t find a way to make a radio button insert \"false\".

My code is the foll

Answer 1

I recently came to another solution for this:

validates_presence_of :accident_free, :if => 'accident_free.nil?'

Explanation here