Singular resources namespaced by its slug (Routing)


I have the followed Rails 3 routes:

    Hello::Application.routes.draw do       resources :blogs do         resources :articles do           resources :comments         end       end     end

By raking them, we can find (for instance):

    GET /blogs/:blog_id/articles(.:format) {:action=>"index", :controller=>"articles"}

Because every routes begin with the same root path (*/blogs*), I would like to shorten addresses by removing it (when :blog_id is given).

In this why, I could have thoses routes (I think it's more DRY):

    GET /:blog_id/articles(.:format) {:action=>"index", :controller=>"articles"}

According to you, what kind of change I should make over my current routes configuration?