Gacha

You'r right, it works. But I didn't see any warning when I used _delete option.

I created Rails 2.3.8 test application:

class User < ActiveRecord::Base
  has_many :addresses
  accepts_nested_attributes_for :addresses, :allow_destroy => tru...

Working workaround:

  response.headers['Set-Cookie'] = "welcomed=true; path=/; expires=#{I18n.l(1.year.from_now, :locale => :en, :format => "%a, %d-%b-%Y %H:%M...

Example code:

  cookies[:welcome] = {:value => 1, :expires => 1.day.from_now}

  Set-Cookie: welcome=1; path=/; expires=Pk, 15-...