stock.py 文件源码

 复制代码def allocate_cost_by_value(self):
        pool = Pool()
        Currency = pool.get('currency.currency')
        Move = pool.get('stock.move')

        if not self.cost:
            return

        cost = Currency.compute(self.cost_currency, self.cost,
            self.company.currency, round=False)
        moves = [m for m in self.incoming_moves
            if m.state not in ('done', 'cancel')]

        sum_value = 0
        unit_prices = {}
        for move in moves:
            unit_price = Currency.compute(move.currency, move.unit_price,
                self.company.currency, round=False)
            unit_prices[move.id] = unit_price
            sum_value += unit_price * Decimal(str(move.quantity))

        costs = []
        digit = Move.unit_price.digits[1]
        exp = Decimal(str(10.0 ** -digit))
        difference = cost
        for move in moves:
            quantity = Decimal(str(move.quantity))
            if not sum_value:
                move_cost = cost / Decimal(len(moves))
            else:
                move_cost = cost * quantity * unit_prices[move.id] / sum_value
            unit_shipment_cost = (move_cost / quantity).quantize(exp,
                rounding=ROUND_DOWN)
            costs.append({
                    'unit_shipment_cost': unit_shipment_cost,
                    'difference': move_cost - (unit_shipment_cost * quantity),
                    'move': move,
                    })
            difference -= unit_shipment_cost * quantity
        costs.sort(key=itemgetter('difference'))
        for cost in costs:
            move = cost['move']
            quantity = Decimal(str(move.quantity))
            if exp * quantity < difference:
                cost['unit_shipment_cost'] += exp
                difference -= exp * quantity
            if difference < exp:
                break

        for cost in costs:
            move = cost['move']
            unit_shipment_cost = Currency.compute(
                self.company.currency, cost['unit_shipment_cost'],
                move.currency, round=False)
            unit_shipment_cost = unit_shipment_cost.quantize(
                exp, rounding=ROUND_HALF_EVEN)
            move.unit_price += unit_shipment_cost
            move.unit_shipment_cost = unit_shipment_cost
        Move.save(moves)