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1004566
2006 Mar 14
5
GROUP BY and SUM
I have orders, order_items, and products.
I want to collate several orders so that I can get a SUM of quantities
ordered for each product etc.
Can I say something like (the below gives an error on :sum, and ignores
:group)
OrderItem.find(:all, :sum => ''quantity'', :group => ''product_id'',
:include => [:order, :product])
I want to get back a