Hi people
I want to know if you know how to write the following sql query in a
more "rails way"
UPDATE buy_order_detail
SET saldo = saldo - detail_purchase.cantidad
FROM purchase_detail
INNER JOIN purchase ON purchase.id =
purchaser_detail.purchase_id
INNER JOIN waybill ON waybill.id =
purchase.waybill_id
INNER JOIN buy_order ON buy_order.id =
waybill.order_id
INNER JOIN buy_order_detail ON buy_order.id =
buy_order_detail.order_id
WHERE purchase_detail.product_id = buy_order_detail.product_id
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