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leylaKapi/trigger.rb

Created February 27, 2017 11:15
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trigger
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trigger.rb
after_save :update_subtotal
def calc_subtotal
order_items.includes(:model).collect {|oi| oi.valid? ? (oi.unit_price.to_f) : 0}.sum
end
def update_subtotal
self.update_column(:subtotal, calc_subtotal)
end
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