#221 Subdomains in Rails 3

Subdomains in rails. This was easier than I though it would be.

In a Rails 2 application we would have needed to use a plugin to do this, but in Rails 3 this is built in. The :subdomain option takes either a string or a regular expression and here we’ve used a regular expression that matches at least one character so any subdomain will match the route. Note that it is important that the route root comes after the subdomain route. If not, the root route will catch the subdomain routes and the subdomain route will never be called. As a general rule of thumb the more specific a route is the higher up in the list it should be.

Full article: http://railscasts.com/episodes/221-subdomains-in-rails-3?...