Devise not working well with multiple subdomains on RoR3 application

Question

I have seen a lot of questions about this topic, but a lot of them have contradictory information, and for some reason it didnt work for me.

I have:

Answer 1

According to this guy here: Rails: how can I share permanent cookies across multiple subdomains? You need to set the domain manually? Googling around it looks like '.domainname.com' with the dot at the beginning really is the way to go.

If you inherit from Devise::SessionsController you can manually set it on create

class SessionsController < Devise::SessionsController
  def create
    # modify the cookie here
    super
  end
end

I am setting up a working example to test that out, I'll post back afterwards, cheers!

And here is my Edit

Forget tempering with the token on create. The problematic is this, you need to have the token domain set to '.lvh.me' that's all there is to it, but domain: '.lvh.me' just doesn't do anything. Here is my proof of concept and ultimately it boiled down to a single change inside a controller:

class HomeController < ApplicationController
  def index
    cookies[:_cookietest_session] = {domain: '.lvh.me'}
  end
end

In Chrome the token would look like this

And that for subdomain.lvh.me, lvh.me and any other subdomain I tried. I can sign_in/sign_out from any and the session is created/destroyed accordingly.

Now I wouldn't advise doing it the way I did, I liked the middleware approach I think it would work just fine if setup properly. Let me know if you need further help on this.

Cheers!

Ok last thing

I went back and tried domain: :all because it really ought to work as you have expected. If I access lvh.me I get a cookie with .lvh.me but if I got to subdomain.lvh.me I get one that reads .subdomain.lvh.me