Rails 3 routing - passing params from routes.rb

In rails 2.3.5 you could do something like this inside the routes.rb file:

map.root :controller => "pages", :action => "show", :id => 3

In rails 3 I haven't found any way to pass a specific parameter 开发者_运维知识库(like in rails 2.3.5 with :id => 3).

I know I can handle it from the controller and have the same result (which I did), but I was wondering if there is a way to do the same thing in rails 3 from the routes.rb or has it changed because it is better practice for some reason?

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Are you sure the following doesn't work?

root :to => "pages#show", :id => 3