still routes.

Can I do something like that?

resources :rusers do
    resources :deliveries
    resources :doc_details
end

Or it is best to do:

resources :rusers do
    resources :deliveries
end

resources :rusers do
    resources :doc_details
end

this works

resources :rusers do
resources :deliveries
resources :doc_details
end

but watch this to clear everything up

http://railscasts.com/episodes/203-routing-in-rails-3

http://railscasts.com/episodes/231-routing-walkthrough