TypeError: Field 'id' expected a number but got <django.db.models.fields.related_descriptors

Question

我有一个简单的视图，用于显示根据请求数据的用户类型有条件地过滤的所有当前用户。

models.py

class User(AbstractBaseUser, PermissionsMixin):

    class SEX(models.TextChoices):
        MALE = "MALE", "Male"
        FEMALE = "FEMALE", "Female"

    class TYPES(models.TextChoices):
        ...

    type = models.CharField(
        _("User Type"), max_length=50, choices=TYPES.choices, default=None, blank=True, null=True)
    sex = models.CharField(
        _("Sex Type"), max_length=50, choices=SEX.choices, default=None, blank=True, null=True)
    email = models.EmailField(
        _("Your Email"), max_length=254, unique=True, default=None, blank=True, null=True)
    student_id = models.CharField(
        _("student id"), unique=True, max_length=10, blank=True, null=True)
    firstname = models.CharField(max_length=250, blank=False, null=True)
    middlename = models.CharField(max_length=250, blank=True, null=True)
    lastname = models.CharField(max_length=250, blank=False, null=True)
    # grade = models.ForeignKey(Grade, verbose_name=_(
    #     "grade"), on_delete=models.CASCADE, blank=True, null=True)
    room = models.ForeignKey(Class, verbose_name=_(
        "class"), on_delete=models.CASCADE, blank=True, null=True)
    phone = models.CharField(
        _("phone number"), max_length=13, blank=True, null=True)
    age = IntegerRangeField(min_value=1, max_value=99,
                            default=25, blank=True, null=True)

    owns = models.ManyToManyField(School, verbose_name=_(
        "School_owner"), related_name='Schoolowner', blank=True)

    workes = models.ForeignKey(School, verbose_name=_(
        "School_workes"), related_name='Schoolworkes', on_delete=models.SET_NULL, blank=True, null=True)

    learns = models.ForeignKey(School, verbose_name=_(
        "School_learns"), related_name='Schoollearns', on_delete=models.SET_NULL, blank=True, null=True)

    image = models.ImageField(
        _("photo"), upload_to='user/pp', max_length=None, blank=False, null=True)
    joined_date = models.DateTimeField(
        _("created at"), auto_now=False, auto_now_add=True)
    is_active = models.BooleanField(default=False)
    is_staff = models.BooleanField(default=False)
    is_superuser = models.BooleanField(default=False)
    last_login = models.DateTimeField(
        _("last login"), auto_now=True, auto_now_add=False)

serializers.py

  class MyAccountSerializer(serializers.ModelSerializer):
        image = serializers.ImageField()
    
        class Meta:
            model = User
            fields = ['id', 'sex', 'type', 'phone', 'image', 'email', 'student_id', 'firstname', 'middlename', 'lastname',
                      'image', 'joined_date', 'is_active', 'is_superuser', 'is_staff', 'last_login']

views.py

class TeacherList(generics.ListAPIView):
permission_classes = [IsAuthenticated, ]
serializer_class = ListUsersSerializer
queryset = User.objects.filter(type=User.TYPES.TEACHER)

像这样的简单过滤器没有任何错误，但因为我需要根据请求用户过滤响应

这就是我想要使用的

class TeacherList(generics.ListAPIView):
    permission_classes = [IsAuthenticated, ]
    serializer_class = ListUsersSerializer
    # queryset = User.objects.filter(type=User.TYPES.TEACHER)

    def get_queryset(self):
        request = self.request.user
        if request.type == User.TYPES.OWNER:
            queryset = User.objects.filter(
                type=User.TYPES.TEACHER, workes=request.owns)
        elif request.type in [User.TYPES.STAFF, User.TYPES.DIRECTOR, User.TYPES.VICE_DIR]:
            queryset = User.objects.filter(
                type=User.TYPES.TEACHER, workes=request.workes)
        return queryset

但是这向我显示了如下错误：

Field 'id' expected a number but got <django.db.models.fields.related_descriptors.create_forward_many_to_many_manager.<locals>.ManyRelatedManager object at 0x0000019D64AE7D60>.

我怀疑它与一个多对多字段有关，我有一个名为 owns 的字段，这是我在其中一种情况下用来过滤的字段，但不知道为什么会抛出错误

Answer 1

我认为不是

queryset = User.objects.filter(
            type=User.TYPES.TEACHER, workes=request.owns)

你应该尝试这样的事情：

queryset = User.objects.filter(
            type=User.TYPES.TEACHER, workes__in=request.owns.all())

或

queryset = User.objects.filter(
            type=User.TYPES.TEACHER, workes__in=request.owns.values_list("id", flat=True))

它应该匹配具有来自 request.owns 个 ID 的所有 ID 的所有用户。

TypeError: Field 'id' expected a number but got <django.db.models.fields.related_descriptors

TypeError: Field 'id' expected a number but got <django.db.models.fields.related_descriptors

python

django

django-rest-framework