python - 类型错误 : Field 'id' expected a number but got

Question

Cannot cast AnonymousUser to int.
Are you trying to use it in place of User?

当我向我的 url 发出发布请求时，我不确定如何调整我的代码以停止生成此错误。我附上了我的序列化程序、 View 和模型的代码。

class ActivitySessionSerializer(serializers.Serializer):
    activity_name = serializers.CharField(min_length=1, max_length=100)

    def create(self, validated_data):
        activity, created = Activity.objects.get_or_create(name=validated_data['activity_name'], 
        owner=self.context['request'].user)

        return ActivitySession.objects.create(activity=activity, start_time=datetime.datetime.now())



class StartSessionView(generics.CreateAPIView):
    serializer_class = serializers.ActivitySessionSerializer


    User = get_user_model()
    
    class ActivityType(models.Model):
        name = models.CharField(max_length=100)
        user = models.ForeignKey(User, on_delete=models.CASCADE)

    class Activity(models.Model):
        name = models.CharField(max_length=100)
        owner = models.ForeignKey(User, on_delete=models.CASCADE)
        activity_type = models.ForeignKey(ActivityType, on_delete=models.CASCADE, null=True, blank=True)

    class ActivitySession(models.Model):
        activity = models.ForeignKey(Activity, on_delete=models.CASCADE)
        start_time = models.DateTimeField()
        end_time = models.DateTimeField()


    urlpatterns = [
        path('starting_session/', views.StartSessionView.as_view()),
    ]

我相信我是通过换线解决的

Activity.objects.get_or_create(name=validated_data['activity_name'], 
        owner=self.context['request'].user)

到

Activity.objects.get_or_create(name=validated_data['activity_name'], 
        owner=self.context['request'].user.id)

我必须专门添加 id 字段而不是总用户对象

Answer 1

AnonymousUser有 id=None和 pk=None ，所以在这种情况下不能直接使用。相反，建议是 create an instance of user that reflects an anonymous user .