aq1018/mongoid-history — pull request #19 by bensymonds (2011-11-17 11:15:27+00:00)
Title: Use a mongoid observer and controller around_filter to pick up modifying user from controller

I just copied what acts_as_audited does, except I had to do the sweeper bit (the controller around_filter) manually since Rails sweepers are ActiveRecord-specific.