Rails: how to use scope with params and use route with default value of params

I have such lines in routes.rb: scope "/:subdomain/" do resource :order, :only => [:new, :create, :show, :update, :edit, :destroy] do get :cancel, :on => :member put :counter, :on => :member end end And for example, this is typical url: http://mydomain.com/some_subdomain/order/new . This url is mapped to action new of orders controller with params[:subdomain] = "some_subdomain". I want to use name