Python-сообщество

            rate = AutocreditRate()
            rate.autocredit = Autocredit.by_rid(self.request.POST.get('_autocredits_rid'))
            rate.carshow = Carshow.by_rid(self.request.POST.get('_carshows_rid'))
            rate.currency = Currency.by_rid(self.request.POST.get('_currencies_rid'))
            # ----------------------
            rate.manufacturer = Manufacturer.by_rid(self.request.POST.get('_manufacturers_rid'))
            for _cars_rid in _cars_rids:
                    rate.car = Car.by_rid(_cars_rid)
                    DBSession.add(rate)
                    DBSession.flush()

autocredit = Autocredit.by_rid(self.request.POST.get('_autocredits_rid'))
carshow = Carshow.by_rid(self.request.POST.get('_carshows_rid'))
currency = Currency.by_rid(self.request.POST.get('_currencies_rid'))
manufacturer = Manufacturer.by_rid(self.request.POST.get('_manufacturers_rid'))
for _cars_rid in _cars_rids:
    rate = AutocreditRate()
    rate.autocredit = autocredit
    rate.carshow = carshow
    rate.currency = currency
    rate.manufacturer = manufacturer
    rate.car = Car.by_rid(_cars_rid)
    DBSession.add(rate)

def __copy__(self):
    _rate = AutocreditRate()
    for prop in object_mapper(self).iterate_properties:
        if (isinstance(prop, ColumnProperty) or isinstance(prop, RelationshipProperty) and prop.secondary):
                setattr(_rate, prop.key, getattr(self, prop.key) if prop.key!='rid' else None)
    return _rate

_cars_rids = list(set(self.request.POST.getall('_cars_rid')))
for i, _cars_rid in enumerate(_cars_rids):
    rate.car = Car.by_rid(_cars_rid)
    if not i:
        DBSession.add(rate)
    else:
        new_rate = copy.copy(rate)
        DBSession.add(new_rate)