Question

我得到了这个错误，我已经搜索并解决了这个问题，已经添加了date_time变量，但是不能，我只想使用viewset，请帮我解决：（

django.core.exceptions.FieldError: Cannot resolve keyword 'transaction' into field. Choices are: address, created_at, deleted_at, id, notification, phone_number, status, total, transactionvariant, updated_at, user, user_id

这是我的def destroy（views.py）：

class TransactionView(viewsets.ViewSet):
    def list(self, request):
        user = get_object_or_404(User, pk=request.user.id)
        queryset = Transaction.objects.filter(user_id=user).exclude(deleted_at__isnull=False)
        serializer = TransactionSerializer(queryset, many=True)

        return Response(serializer.data, status=200)

    def retrieve(self, request, pk=None):
        user = get_object_or_404(User, pk=request.user.id)
        transaction = TransactionVariant.objects.filter(transaction__pk=pk).filter(transaction__user_id=user)
        serializer = TransactionVariantSerializer(transaction, many=True)
        return Response(serializer.data)

    def destroy(self, request, pk=None):
        date_time = datetime.now()
        # user = get_object_or_404(User, pk=request.user.id)
        transaction = Transaction.objects.filter(transaction__pk=pk).update(deleted_at=date_time)
        serializer = TransactionSerializer(transaction, many=True)
        return Response(serializer.data)

和我的serializers.py

class ProductSerializer(serializers.ModelSerializer):
    class Meta:
        model = Product
        fields = ('name',)

class VariantSerializer(serializers.ModelSerializer):
    # product = ProductSerializer(many=False, read_only=True)
    class Meta:
        model = Variant
        fields = ('name', 'size', 'color', 'price', 'image_link',)

class TransactionVariantSerializer(serializers.ModelSerializer):
    variant = VariantSerializer(many=False, read_only=True)
    # products = serializers.VariantSerializer(variant)
    # products = serializers.(fields='variant')
    class Meta:
        model = TransactionVariant
        fields = ('quantity','variant')


class TransactionSerializer(serializers.ModelSerializer):
    transaction_id = serializers.IntegerField(source='id')
    # product = ProductSerializer(many=False, read_only=True)
    # variant = VariantSerializer(many=False, read_only=True)
    class Meta:
        model = Transaction
        # fields = ('transaction_id','user_id','status','total','created_at')
        fields = '__all__'

Answer 1

我不确定您为什么使用transaction__pk。双下划线表示要遵循的关系，因此假设您正在通过transaction ForeignKey在相关模型上寻找pk字段。但是您没有ForeignKey，而pk直接位于Transaction模型上。只需使用：

Transaction.objects.filter(pk=pk)...

Answer 2

我已经解决了！这是我的新代码：

def destroy(self, request, pk=None):
        # transaction_id = TransactionVariant.objects.filter(transaction__pk=transactionvariant.transaction__pk)
        # transaction_variant = TransactionVariant.objects.select_related('transaction').get(id=1)
        # print("hihihhihiihihi",transaction_variant)

        date_time = datetime.now()
        user = get_object_or_404(User, pk=request.user.id)
        transaction = TransactionVariant.objects.filter(transaction__pk=pk).update(deleted_at=date_time)
        transaction = Transaction.objects.filter(id=pk).update(deleted_at=date_time)
        print("adsfasdf", transaction)
        serializer = TransactionSerializer(transaction, many=True)
        return Response(serializer.data, many=True)

但是之后，使用url（http://localhost:8000/api/transactions/3/）METHOD Delete时出现新错误，我的数据库当然已经更新了transaction和transaction_variant的Deleted字段，但显示此日志： TypeError：“ int”对象不可迭代

您可以从顶部引用我的serializer.py

不能使用def destroy viewset.viewset（软删除）

2 个答案: