NICE http://wiki.rubyonrails.org/rails/pages/UnderstandingPolymorphicAssociations Looks like I should be able to do this: q[class Comment true end]q q[class Journal :commentable end...

And it looks like I'll be able to take advantage of Single Table Inheritance for the three similar models (News, Journals, ForumThreads), and at the same time take advantage of the Polymorphic Asso...

Yep, I found a bug. STI and Polymorphic Associations don't play together nicely all the time. nzkoz (rails core member) says it's a real live defect. Details here http://rafb.net/paste/results/c...