caching: fresh_when unless dev

Is there any way to disable HTTP caching when in DEV?

The best I figured out for now is overriding fresh_when method like this:

def fresh_when     super(yield) unless ENV['RAILS_ENV'] == 'development'   end

and in controllers it looks:

fresh_when do       max_created_at = Time.now # for instance       {last_modified: max_created_at.utc, etag: Digest::MD5.hexdigest(max_created_at.to_s)}     end