Pages tagged auditing:

AirBlog — A Paper Trail For Your Models
http://blog.airbladesoftware.com/2009/6/23/a-paper-trail-for-your-models

PaperTrail lets you track changes to your Rails app’s models’ data. It’s good for auditing or versioning. You can see how a model looked at any stage in its lifecycle and even undelete it after it’s been destroyed.
acts_as_versioned simply_audited