(rtve) utils.py

def update_remains_period(actor, start, end, company_object):
    """
    Обновить остатки топлива за период.
    """
    fuel_infos = FuelInfo.objects.filter(active=True, boiler=company_object)
    for date in get_period_dates(start, end):
        for fuel_info in fuel_infos:
            # Запись, которую нужно обновить
            record = None
            try:
                record, created = FuelRemains.objects.get_or_create(
                    fuel_info=fuel_info, date=date, boiler=company_object
                )
            except FuelRemains.MultipleObjectsReturned:
                records = FuelRemains.objects.filter(fuel_info=fuel_info, date=date)
                if records.exists():
                    record = records[0]
                    records[1:].delete()

                    if record:
                update_remain(actor, record)

# 4271a68
def update_remain(actor, record):
    """Обновляет расчётные показатели по остаткам топлива."""
    record.editor = actor

    fuel_info_id = record.fuel_info.id
    record_date = record.date

    obj = FuelRemains.objects.get(
        date=get_month_day(record_date, 1),
        fuel_info__id=fuel_info_id
    )
    # Остатки на начало месяца
    record.first_day_month = obj.first_day_month

    fc = FuelConsumption.objects.filter(
        date__range=get_range(record_date),
        fuel_info__id=fuel_info_id
    ).aggregate(actual=Sum('actual_day'))

    fi = FuelIncome.objects.filter(
        date__range=get_range(record_date),
        fuel_info__id=fuel_info_id
    ).aggregate(
        income=Sum('today'),
        pickup=Sum('pickup')
    )

    parts = (
        record.first_day_month,
        fi['income'] or 0.0,
        fc['actual'] or 0.0,
        fi['pickup'] or 0.0
    )

    # round реализует не арифметическое, а банковское округление

    # remains = record.calc_remain_tonnes(*parts)
    # record.tonnes = round(remains, 3)

    def get_remain_tonnes():
        from decimal import Decimal

        initial, income, consumption, pickup = tuple(map(Decimal, parts))
        remains = (
            (initial + income - consumption - pickup)
            .quantize(Decimal('.1111'), rounding='ROUND_HALF_UP')
            .quantize(Decimal('.111'), rounding='ROUND_HALF_UP')
        )

        return float(remains)

    record.tonnes = get_remain_tonnes()

    fc = FuelConsumption.objects.get(
        date=record_date,
        fuel_info__id=fuel_info_id
    )

    if fc.actual_day and fc.actual_day > 0:
        record.days = int(record.tonnes / fc.actual_day)
    else:
        record.days = 0

    record.save(force_update=True)