Rails - May 2007 - restful cart routing problems

I want to have a cart with urls like this

 it "should map { :controller => ''cart'', :action =>
''index'' } to /cart" do
    route_for(:controller => "cart", :action =>
"index").should == "/cart"
  end

  it "should map { :controller => ''cart'', :action
=> ''show'', :id => 1 } to
/cart/1" do
    route_for(:controller => "cart", :action =>
"show", :id => 1).should ="/cart/1"
  end

  it "should map { :controller => ''cart'', :action
=> ''edit'',:id => 1} to
/cart/1/edit" do
    route_for(:controller => "cart", :action =>
"edit",:id => 1).should ="/cart/1/edit"
  end

  it "should map { :controller => ''cart'', :action
=> ''update'',:id => 1 } to
/cart/1" do
    route_for(:controller => "cart", :action =>
"update",:id => 1).should ="/cart/1"
  end

  it "should map { :controller => ''cart'', :action
=> ''destroy'',:id => 1} to
/cart/1" do
    route_for(:controller => "cart", :action =>
"destroy",:id => 1).should
== "/cart/1"
  end

That is, I want cart to act like a plural resource mapping for the singular
cart_items but I don''t know how to do this

map.resources :carts would give me urls like /carts/1

I tried to map it the long way
 map.with_options(:controller => "cart") do |m|
    m.cart_url "/cart",:action => "index",:method =>
:get
    m.formatted_cart_url "/cart.:format",:action =>
"index",:method => :get
    m.cart_item "/cart/:id", :action => "show", :method
=> :get
    m.connect "/cart/:id", :action => "update", :method
=> :put
    m.connect "/cart/:id", :action => "destroy", :method
=> :delete
  end

but this didn''t pass the above specification

What would be the best way to map this so I get the urls like above

Thanks,

dom

I

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