OpenID support for Ruby on Rails application

Question

What is current state of the art for enabling OpenID login in Ruby on Rails applications? This is a community wiki with up-to-date answers to this question.

Authlog

Answer 1

What I've done is use restful-authentication and then blend the open_id_authentication plugin into your application. It might help to setup the open_id_authentication plugin on a test app as well, so you can determine the changes you'll need to make to the users table.