samhuri.net/posts/2006/03/generate-selfdown-in-your-rails-migrations.md

Title	Author	Date	Timestamp	Tags
Generate self.down in your Rails migrations	Sami Samhuri	3rd March, 2006	1141450680	rails, textmate, migrations, rails, textmate

Scott wrote a really cool program that will scan self.up and then consult db/schema.rb to automatically fill in self.down for you. Brilliant!