Let's see how session data is handled in Rails 3.2 . If you generate a Rails application in 3.2 then ,by default, you will see a file at config/initializers/session_store.rb. The contents of this file is something like this. 1Demo::Application.config.session_store :cookie_store, key: '_demo_session'Copy As we can see _demo_session is used as the key to store cookie data. A single site can have coo