Kevin Clark presents "Things You Shouldn't Be Doing in Rails". It's not a list of things Rails isn't any good for, rather it's features or concepts related to Rails that you shouldn't be using. It covers deprecated finders, the in-built pagination classes, scaffolding, engines, layouts, and namespaced controllers.

Comments
topfunky ·
I've written a simple plugin that searches for these deprecated techniques in your app.
http://nubyonrails.com/articles/2006/08/31/deprecated-plugin-find-old-rails-code
Peter Cooper ·
I was going to be posting about that later today (in fact, I still will ;-)) Thanks!