serializers.py 文件源码

def _insupd_order(self, basket, user=None, shipping_address=None, billing_address=None, **kwargs):
        existing_orders = basket.order_set.all()
        if existing_orders.exclude(status=settings.ORDER_STATUS_PAYMENT_DECLINED).exists():
            raise exceptions.NotAcceptable(_("An non-declined order already exists for this basket."))

        existing_count = existing_orders.count()
        if existing_count > 1:
            raise exceptions.NotAcceptable(_("Multiple order exist for this basket! This should never happen and we don't know what to do."))

        # Get request object from context
        request = self.context.get('request', None)

        # If no orders were pre-existing, make a new one.
        if existing_count == 0:
            return self.place_order(
                basket=basket,
                user=user,
                shipping_address=shipping_address,
                billing_address=billing_address,
                request=request,
                **kwargs)

        # Update this order instead of making a new one.
        order = existing_orders.first()
        kwargs['order_number'] = order.number
        status = self.get_initial_order_status(basket)
        shipping_address = self.create_shipping_address(
            user=user,
            shipping_address=shipping_address)
        billing_address = self.create_billing_address(
            user=user,
            billing_address=billing_address,
            shipping_address=shipping_address,
            **kwargs)
        return utils.OrderUpdater().update_order(
            order=order,
            basket=basket,
            user=user,
            shipping_address=shipping_address,
            billing_address=billing_address,
            status=status,
            request=request,
            **kwargs)