You know those invitation systems where a given user can invite a number of other people to join? That's what I show you how to make in this episode.

Learn how to unleash the full potential of subdomains with the subdomain-fu Rails plugin in this episode.

Tired of juggling multiple Rails apps around with script/server? See how to set up Passenger in development so each one has its own local domain name.

This episode will show you how to make a model which isn't based on Active Record. You may want to do this if a resource isn't backed by the database.

If you need a full text search engine, Thinking Sphinx is a great solution. See why in this episode.

If you have a lot of logic associated with the data inside a session, you'll need some central location to put this logic. See how to create a session based model in this episode.

Liquid is a safe way to provide a powerful template language to the site's users. See how in this episode.

Static pages can sometimes be a little awkward to add to a Rails app. See a couple different solutions to this problem in this episode.

Selenium is a great way to test your app automatically through a browser. See how it works in this episode.

Rails 2.1 brings some new caching features which makes it very easy to cache any values including models. See how in this episode.