Created
February 27, 2017 11:15
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| 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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