python – django / rest：我可以只有一个字段的序列化器吗？

使用rest-framework,我想搜索有uid的病人.

当我尝试只有一个字段的序列化程序时,我得到错误Thefieldsoption必须是列表或元组或“__all__”.得了..

是否有任何解决方案只有一个字段来搜索用户？

serializers.py

class GetUserSerializer(serializers.ModelSerializer):
    id = serializers.CharField(source='uid')

    class Meta:
        model = User
        fields = ('id')

views.py

class GetUser(CreateAPIView):
    permission_classes = ()
    serializer_class = GetUserSerializer

    def get(self,request):
        serializer = GetUserSerializer(data=request.data)
        # Check format and unique constraint
        if not serializer.is_valid():
            return Response(serializer.errors,
                            status=status.HTTP_400_BAD_REQUEST)
        data = serializer.data


        if User.objects.filter(uid = data['id']).exists():
            user = User.objects.get(uid = data['id'])
            resp = {"user":{"uid":user.uid,"firstname":user.firstname,"yearofbirth": user.yearofbirth,
                            "lastnames": user.lastname,"othernames": user.othernames}}
            return Response(resp,status=status.HTTP_200_OK)

        else:

            resp = {"error": "User not found"}
            return Response(resp,status=status.HTTP_404_NOT_FOUND)

models.py

class User(models.Model):
    uid = models.CharField(max_length=255,unique=True,default="0")
    firstname = models.CharField(max_length=255)
    lastname = models.CharField(max_length=255,blank=True)
    othernames = models.CharField(max_length=255,blank=True)
    yearofbirth = models.SmallIntegerField(validators=[MinValueValidator(1900),MaxValueValidator(2018)],null = False