Customized subdomains, multitenancy, and custom selects with Rails - OddJob U

Every week of the 20/20 challenge, I’ll be noting some of the top coding highlights and offering small tips & tricks. Feel free to ask questions in the comments/the twitter/email/etc.

For those of you who are interested, OddJob U was made on Ruby on Rails, using pgSQL.  We're hosting this app, and most likely all of our apps, onHeroku.  They have a free tier for apps that can be scaled when needed, and they save us a lot of money and time.