Ruby on Rails: how do I get the top 5 of something?

I have a c开发者_JAVA技巧olumn, money, and I want the top 5 most expensive activeRecord items.

How do I do that?

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find(:all, order => "money desc" :limit => 5)

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Rails 3 (ARel) syntax:

Item.order('items.money DESC').limit(5)