I have the same Problem in find. Car.find(:all) returns two Records RallyCar.count Car.find(:all) returns four Records
This is a known pecularity of STI - when you do a count for the subclass it adds a type = "Car" condition. This obviously doesn't find instances of RallyCar. Once the RallyCar class is loaded then ActiveRecord is aware of its existance and will add type = "Car" or type = "RallyCar" as the condition. It's a bit messy but in production it should work fine (since all classes are loaded up front) or you can also use require_dependency to force them to be loaded (ie at the bottom of car.rb stick require_dependency 'rally_car')
Fred
