How to get the subdomain value from a url?

Question

how can I get the subdomain value in rails, is there a built-in way to do this?

e.g.

test123.example.com

I want the test123 part of

Answer 1

You can use the SubdomainFu plugin. This plugin gives you a method current_subdomain which returns the current_subdomain of your app.

You can also have a look at this Railscast

UPDATE

You can also use request.subdomains this will give you an array of subdomains.