django-rest-framework - 'QuerySet' 对象没有属性 'pk'

Question

#models
class Student(models.Model):
firstname =  models.CharField(max_length=100,default='ll')
lastname = models.CharField(max_length=100,default='fewf')
id_code = models.CharField(max_length=10,default=0,unique=True)
melli = models.CharField(max_length=30,default=0,unique=True)
personal_pic = models.ImageField(upload_to=studentFile)
major = models.ForeignKey(Major, on_delete=models.PROTECT,default=0)
date_of_start = models.DateField(default=datetime.date.today)

def __str__(self):
    return self.id_code

#views
class loginView(APIView):
def post(self, request):
    data = request.data
    melli = data.get('melli')
    id_code = data.get('id_code')
    student = Student.objects.filter(id_code=id_code,melli=melli)
    if not student.exists():
       return Response('error')
    serializer = StudentSerializer(student,data=data)
    serializer.is_valid()
    return Response(serializer.data)

当我尝试提交帖子请求时，我被接受以收到回复，但出现错误。我该如何解决？

Answer 1

您序列化了一组元素，因此您应该使用 many=True :

serializer = StudentSerializer(student,data=data, many=True)

如果您只想处理单个对象，则需要检索单个对象，而不是对象集合，例如使用 .get(…) [Django-doc]而不是 .filter(…) [Django-doc] .