How do I get the absolute path of a resource in Rails 3?

Question

I would like to get the full absolute path to a resource including the domain name in Rails 3.

Example: to get the full path to the home page I have tried:

url_for( :controller => 'home', :action => 'index' ) 

and

root_path 

but both give me just: / but I want: http://www.example.com/

The answer should also work on my dev server and return: http://localhost:3000/

Answer 1

Use root_url. The _url extension on the end gives the full URL, something like http://localhost:3000/projects/1/tickets/2.