ruby on rails - Not staying signed in with omniauth-facebook -

i've followed ryan's cast on signing in omniauth-facebook , signing in works great.

the problem i'm having though staying signed in. right i'm signed in until close browser window. if open browser again , go website i'm signed out. same goes other people on other machines , other facebook accounts.

i'm not familiar workings of sessions , facebook authentication it's hard me analyse going wrong exactly.

maybe of know going on? in advance!

my code:

application_controller:

def current_user   @current_user ||= user.find(session[:user_id]) if session[:user_id] end helper_method :current_user 

sessions_controller:

def create  user = user.from_omniauth(env["omniauth.auth"])  session[:user_id] = user.id  redirect_to root_url end 

user.rb:

def self.from_omniauth(auth)   where(auth.slice(:provider, :uid)).first_or_initialize.tap |user|     user.provider = auth.provider     user.uid = auth.uid     user.name = auth.info.name     user.email = auth.info.email     user.pic_url = auth.info.image     user.oauth_token = auth.credentials.token     user.oauth_expires_at = time.at(auth.credentials.expires_at)     user.save!   end end 

omniauth.rb:

omniauth.config.logger = rails.logger  rails.application.config.middleware.use omniauth::builder   provider :facebook, config[:facebook_app_id], config[:facebook_app_secret], scope 'email', display: 'popup' end 

it's straight in devise wiki

on signup in sessionscontroller do

remember_me(user) 

and sure have :rememberable passed devise option in user model.

side note - think use quite outdated flow, right encouraged solution have omniauthcallbackscontroller think.