So after my last post about Mr. Clark's Rails no-nos list (now with extra followup!), I decided to act on Rob Sanheim's suggestion: that a site be created detailing the deprecated parts of Rails and solutions for same.  I first thought of a blog, but I'm lazy and I don't want to write it all.  Deciding that the Official Rails Wiki would be a much better (and easier) repository, I went there and found the perfect page already waiting for me: Deprecated Patterns.  I filled it in, with the requisite bad wikiformatting (can't we all agree on what ' * ' means?).  If you care enough to add an item, please play along with the best practices set forth below:
  1. Present a solution along with the problem.
  2. Explain why the old way is bad and the new way is better.
  3. Keep it simple.
The resulting page should provide a ready resource for those who want to play catch up.