Ruby on Rails : add a new route

Question

I'm new with RoR so this is a newbie question:
if I have a controller users_controller.rb and I add a method foo, shouldn't it create this route?

http://www.localhost:3000/users/foo

because when I did that, I got this error:

Couldn't find User with id=foo

I of course added a view foo.html.erb

EDIT:
I added to routes.rb this code but I get the same error:

resources :users do
    get "signup"
  end

Answer 1

This doesn't work automatically in rails 3. You'll need to add

resource :users do
    get "foo"
end

to your routes.rb

You'll definitely want to have a look at http://guides.rubyonrails.org/routing.html, it explains routing pretty well.