Question

我正在使用Django和Django Rest Framework 2.4.0

我收到属性错误type object 'Notification' has no attribute 'objects'

models.py

class Notification(models.Model):
    NOTIFICATION_ID = models.AutoField(primary_key=True)
    user = models.ForeignKey(User, related_name='user_notification')
    type = models.ForeignKey(NotificationType)
    join_code = models.CharField(max_length=10, blank=True)
    requested_userid = models.CharField(max_length=25, blank=True)
    datetime_of_notification = models.DateTimeField()
    is_active = models.BooleanField(default=True)

serializers.py：

class NotificationSerializer(serializers.ModelSerializer):
    class Meta:
        model = Notification
        fields = (
            'type',
            'join_code',
            'requested_userid',
            'datetime_of_notification'
        )

api.py：

class Notification(generics.ListAPIView):
    serializer_class = NotificationSerializer
    def get_queryset(self):
        notifications = Notification.objects.all()
        return notifications

有人可以帮我解决这个问题吗？它在api.py

行notifications = Notification.objects.all()处失败

Answer 1

第notifications = Notification.objects.all()行引用了api.py中定义的Notification类，而不是models.py。

解决此错误的最简单方法是重命名api.py或models.py中的Notification类，以便您可以正确引用模型。另一种选择是使用命名导入：

from .models import Notification as NotificationModel

class Notification(generics.ListAPIView):
    ...
    def get_queryset(self):
        notifications = NotificationModel.objects.all()
        ...

Answer 2

将objects = models.Manager()添加到模型或您正在使用的任何其他管理器中。

class Notification(models.Model):
    NOTIFICATION_ID = models.AutoField(primary_key=True)
    user = models.ForeignKey(User, related_name='user_notification')
    type = models.ForeignKey(NotificationType)
    join_code = models.CharField(max_length=10, blank=True)
    requested_userid = models.CharField(max_length=25, blank=True)
    datetime_of_notification = models.DateTimeField()
    is_active = models.BooleanField(default=True)

    objects = models.Manager()

Answer 3

不是这个问题的答案，但是如果您是通过Google来的，则可能不小心将模型标记为抽象，并试图直接对其进行查询，在这种情况下，您需要删除：

    class Meta:
        abstract = True

Answer 4

您可以尝试Model.objects_all.all()

类型对象'X'没有属性'对象'

4 个答案: