Authlogic - return user to intended page after login

Question

How can you adapt a standard Authlogic app so instead of the home page every time, it directs a user to whatever link they were trying to get to?

Example 1 - standard log in works as expected

User goes to app.com
Goes through 'login' process
Redirected to home_url

Example 2 - user attempts to visit a specific page

User goes to app.com/specific_link
Redirected to login_url for authentication
Expects to be sent back to /special_link; instead sent to home_url

How can I return the user to the link they want in Example 2?

Answer 1

Save the page when you go to login, then used that to return the user to that page after login, e.g.

# redirect to the login page. Call this in the login action, when successful.
def redirect_away(*params)
  session[:original_uri] = request.request_uri
  redirect_to(*params)
end

# returns to the original url from a redirect_away or to a default url
def redirect_back(*params)
  uri = session[:original_uri]
  session[:original_uri] = nil
  if uri
    redirect_to uri
  else
    redirect_to(*params)
  end
end