如何在Django中使用Fileupload？

Question

我是django的新手，当我从文档.d中学习django时，我尝试使用序列化程序和基于函数的视图制作api。这表明类型object'Questions'没有属性'objects'

models.py

class Questions:
    title = models.CharField(max_length=40)
    description = models.TextField(max_length=50)
    status = models.CharField(default='inactive', max_length=30)
    created_by = models.ForeignKey(User, null=True, blank=True, on_delete=models.CASCADE)

serializers.py

from rest_framework import serializers
from demoapp.models import Questions


class QuestionSerializer(serializers.ModelSerializer):
    class Meta:
        model = Questions
        fields = (
            'id',
            'title',
            'description',
            'created_by',

        )

urls.py

from django.urls import path
from demoapp.views import *

urlpatterns = [
    path('poll', demoapp),
]

错误是：

enter image description here