Question

我有这个ModelSerializer：

class BidSerializer(serializers.ModelSerializer):

    class Meta:
        model = Bid
        fields = '__all__'

    def validate_amount(self, value):
        auction = Auction.objects.get(id=self.validated_data['auction'])
        if auction.price_step % value:
            raise serializers.ValidationError()

但它会抛出投掷＆＃34; is_valid（）应该被调用＆＃34;例外。如何正确访问拍卖场价值？

Answer 1

如果您想根据另一个字段的值检查一个字段，则应使用object-level-validation

class BidSerializer(serializers.ModelSerializer):

    class Meta:
        model = Bid
        fields = '__all__'

    def validate(self, data):
        auction = Auction.objects.get(id=data['auction'])
        amount = data.get('amount')
        if auction.price_step % amount:
            msg = {'amount' : ['this field is not valid']}
            raise serializers.ValidationError(msg)

如何在序列化器中获取序列化器字段值

1 个答案: