Still routes

Rails
1

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

2

this works

resources :rusers do
resources :deliveries
resources :doc_details
end

but watch this to clear everything up