Warning Explanation: actionpack-2.3.2/lib/action_controller/record_identifier.rb:76: warning: Object#id will be deprecated; use Object#object_id

This warning can happen if you treat an object from a non-active record class like an active record object. For example, you might have a class that wraps a few AR objects.

One hack to get rid of the warning is to just define the method id on your wrapper class.