gistfile1.rb

<%= link_to("show", admin_sale_path(@sale), :class => "with-tip", :title => "show") %>

No route matches {:action=>"show", :controller=>"admin/sales"}

    namespace :admin do
      root :to => "dashboards#index"
      resources :sales do
        collection do 
          get :future
          get :past
        end
        member do
          get :list
        end
        resources :orders do
          collection do
            get :not_paid
          end
        end
      end
    end