module ActionDispatch::Cookies::ChainedCookieJars

def permanent

# => Set-Cookie: remember_me=BAhU--848956038e692d7046deab32b7131856ab20e14e; path=/; expires=Sun, 16-Dec-2029 03:24:16 GMT
cookies.permanent.signed[:remember_me] = current_user.id

This jar allows chaining with the signed jar as well, so you can set permanent, signed cookies. Examples:

This jar is only meant for writing. You'll read permanent cookies through the regular accessor.

# => Set-Cookie: prefers_open_id=true; path=/; expires=Sun, 16-Dec-2029 03:24:16 GMT
cookies.permanent[:prefers_open_id] = true

Returns a jar that'll automatically set the assigned cookies to have an expiration date 20 years from now. Example: 
def permanent
  @permanent ||= PermanentCookieJar.new(self)
end