I am Jack's sofa, stereo and wardrobe... I make Jack's life complete. I reside in a ActiveRecord table called "things" and Jack is the only one that has the key. This is Jack's life, and it's ending one minute at a time.

As rails developers, we have done this simple relationship over and over again. I'm sure the has_many association is by far the most common in app/db design. It gives a single resource quick and easy access to others, but as your application grows, and depression sets in...