Django rest framework 在将数据保存到数据库之前，如何自定义CreateModelMixin

我想将登录用户分配给模型，但执行创建不工作 有没有关于如何解决这个问题的帮助

OkHttp:{“聚合器”：[“无效pk”0”-对象不存在。“]}

seliarizer.py

模型

---

您是否在

views.py

（位于

FarmerViewset

）中使用了

permission\u classes=（IsAuthenticated，）

。您是否也在下面的行中添加了

settings.py

REST_框架={
“默认\u身份验证\u类”：(
'rest_framework.authentication.TokenAuthentication'，
'rest_framework.authentication.SessionAuthentication'，
),
“默认权限类”：(
'rest_framework.permissions.IsAuthenticated'，
),
}`

你能分享你的

模型吗？你登录了吗？@adnankaya我共享了模型，我使用邮递员登录
class FarmerViewset(
        mixins.CreateModelMixin, 
        mixins.RetrieveModelMixin, 
        mixins.UpdateModelMixin,
        # mixins.DestroyModelMixin,
        mixins.ListModelMixin,
        viewsets.GenericViewSet
    ):
    
    queryset = Farmer.objects.all()
    
    serializer_class = FarmerSerializers
        
    def perform_create(self, serializer):
        serializer.validated_data['aggregator'] = self.request.user
        serializer.save()

class FarmerSerializers(serializers.ModelSerializer):
    farmer_requests = RequestSerializers(many=True, read_only=True)
    class Meta:
        model = Farmer
        fields = '__all__'
        extra_kwargs = {
            'created_at': {'read_only': True},
            'updated_at': {'read_only': True},
        }

class Farmer(models.Model):
    first_name = models.CharField(_(" Enter first name"),max_length=30)
    last_name = models.CharField(_(" Enter last name"),max_length=30)
    phone = models.IntegerField(_("Telephone number"), null=True)
    district = models.ForeignKey(
            "authentication.District",
            verbose_name=("district"),
            on_delete = models.CASCADE
        )
    sector = models.ForeignKey(
        "authentication.Sector",
        verbose_name=("sector"),
        on_delete = models.CASCADE
    )
    aggregator = models.ForeignKey(
            "authentication.User",
            verbose_name=("aggregator"),
            on_delete = models.CASCADE
    )
    created_at = models.DateTimeField(_("Date of creation"),default=timezone.now)
    updated_at = models.DateTimeField(_("Updated date"),default=timezone.now)