Rails: Warden/Devise - How to capture the url before login/failed access

Question

I am trying to figure out how to redirect a user to the page they logged in from (or failed to login) using Warden/Devise. I figure there is a session variable somewhere tha

Answer 1

here's the best I could come up with. Works perfectly also with facebook authentication. by adding more restrictions to the prepending of urls to the session variable you can remove more and more paths you don't want the user to return too (e.g. callbacks, splash pages, landing pages, etc)

#ApplicationsController

after_filter :store_location

def store_location
  session[:previous_urls] ||= []
  # store unique urls only
  session[:previous_urls].prepend request.fullpath if session[:previous_urls].first != request.fullpath && request.fullpath != "/user" && request.fullpath != "/user/login" && request.fullpath != "/" && request.fullpath != "/user/logout" && request.fullpath != "/user/join" && request.fullpath != "/user/auth/facebook/callback"
  # For Rails < 3.2
  # session[:previous_urls].unshift request.fullpath if session[:previous_urls].first != request.fullpath 
  session[:previous_urls].pop if session[:previous_urls].count > 3
end

def after_sign_in_path_for(resource) 
  @url = session[:previous_urls].reverse.first
  if @url != nil
    "http://www.google.com" + @url
  else
    root_path
  end
end