I am not understanding the behavior of session storage with active_record_store.
In environment.rb, I uncommented config.action_controller.session_store = :active_record_store
I have this line in a controller (that does get executed) session[:user_id] = user.id
I would think that this should store something in the database. But the session table is empty: x_development=# select * from sessions; id | session_id | data | updated_at