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samleb/snippet.rb

Created April 16, 2010 14:58
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snippet.rb
module ActiveRecord
module Random
def random
select_max_pk = select("MAX(#{primary_key})").to_sql
where("#{primary_key} > ? * (#{select_max_pk})", rand).first
end
end
end
@samleb

samleb commented Apr 16, 2010

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It obviously needs to be extended, not included, i.e. YourModelClass.extend(ActiveRecord::Random).

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