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

Question

Hi:

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 that is either available or could be made available.

E.g. Scenario 1: Non-authorized user goes to protected page X; Redirected to login page; User logs in; User redirected to protected page x

Scenario 2: Non-authorized user wants to take a protected action on page x; User clicks on login link; User logs in; User redirected to page x where the action is now available

Any pointers are appreciated.

Thanks!

Answer 1

You can use request.referer to get the previous URL.

Answer 2

There is a devise helper method called after_sign_in_path_for(resource) (http://rdoc.info/github/plataformatec/devise/master/Devise/Controllers/Helpers) , and a session variable called session[:"user.return_to"] which stores the last url. The after_sign_in_path_for method needs to return a string, then devise automatically uses this path to redirect the user after login.

In my application controller I have put the following which redirects my users to the home page if the session variable is not set:

def after_sign_in_path_for(resource)
    (session[:"user.return_to"].nil?) ? "/" : session[:"user.return_to"].to_s
end