Update 2013: This screencast is obviously obsolete (this is Rails 2 and Rails is already at version 4). It’s maintained here for historical reasons. Page down for brazilian portuguese article Update 12/12: For those of you that think I was too fast in the video, I just posted a Tutorial with most of the content you can see in the screencast plus a few bonuses. I’ve split it into Part 1 and Part 2.