我正在使用 Django createview 在拍賣(mài)網(wǎng)站中創(chuàng)建投標(biāo)項(xiàng)目。createview 將創(chuàng)建新對(duì)象，但它會(huì)創(chuàng)建一個(gè)沒(méi)有相應(yīng)外鍵的額外對(duì)象實(shí)例。我正在使用 @staticmethod 來(lái)確定提交的出價(jià)是否確實(shí)是最高出價(jià)，然后在相關(guān)列表中創(chuàng)建。如果您能指出我做錯(cuò)了什么，請(qǐng)?zhí)崆爸轮x。models.pyclass Bid(TimeStampMixin):    """model representing bid obj"""    auction = models.ForeignKey(        Listing,         on_delete=models.SET_NULL,         related_name='offer',         null=True)    bidder = models.ForeignKey(        settings.AUTH_USER_MODEL,         on_delete=models.SET_NULL,         null=True,        related_name='bid_user')    amount = models.PositiveIntegerField()    objects = BidQuerySet.as_manager()            def __str__(self):        return f"{self.amount} in Listing No: {self.auction.id}"    class Meta:        ordering = ['amount']    @staticmethod    def high_bid(auction, bidder, bid_amount):        """util method to ascertain highest bid in auction then create in related auction obj        :param auction---listing being bid on, bid__auction        :param bidder---user bidding        :param amount--- current highest bid        """        ###error checks, is auction running? is current bid less than start bid? etc        if bid_amount < auction.start_bid:            return        if (auction.highest_offer and bid_amount < auction.highest_offer.amount):            return        if bidder.id is auction.user.id:            raise PermissionDenied        ##after checks create highest bid object in listing model        new_high_bid = Bid.objects.create(            auction= auction,            bidder = bidder,            amount = bid_amount        )