尝试获取序列化程序`UserSerializer`上字段`phone`的值时获取AttributeError`

Question

我正在尝试创建一个视图，使用auth_rest库在一个请求中更新扩展配置文件数据，但出现以下错误：

Got AttributeError when attempting to get a value for field phone on serializer UserSerializer. The serializer field might be named incorrectly and not match any attribute or key on the User instance. Original exception text was: 'User' object has no attribute 'userprofile'.

这是我的模型（UserProfile）

class UserProfile(models.Model):
    user = models.OneToOneField(User, related_name='user', on_delete=models.CASCADE)
    phone = models.CharField(max_length=15, blank=True)
    phone_whatsapp = models.BooleanField(default=False)

    def __str__(self):
        return self.user.username

这是序列化程序：

class UserSerializer(UserDetailsSerializer):
    phone = serializers.CharField(source="userprofile.phone")
    phone_whatsapp = serializers.BooleanField(source="userprofile.phone_whatsapp")
    
    class Meta(UserDetailsSerializer.Meta):
        fields = UserDetailsSerializer.Meta.fields + ('phone','phone_whatsapp',)
    
    def update(self, instance, validated_data):
        profile_data = validated_data.pop('userprofile', {})
        phone = profile_data.get('phone')
        phone_whatsapp = profile_data.get('phone_whatsapp')
        instance = super(UserSerializer, self).update(instance, validated_data)
        # get and update user profile
        profile = instance.userprofile
        if profile_data and phone and phone_whatsapp:
            profile.phone = phone
            profile.phone_whatsapp = phone_whatsapp
            profile.save()
        return instance 

我修改了一些东西，但我无法修复它。有人能帮我吗

提前谢谢