我正在编写一个简单的Django Web应用程序，并且正在尝试实现REST API。我使用django-rest-framework包。我在Debian sid GNU / Linux上使用Python3.x。但是，当我尝试通过浏览器访问REST API时出现错误：
Traceback (most recent call last):
File "/home/lynx/PycharmProjects/hello_world/venv/lib/python3.6/site-packages/django/core/handlers/exception.py", line 35, in inner
response = get_response(request)
File "/home/lynx/PycharmProjects/hello_world/venv/lib/python3.6/site-packages/django/core/handlers/base.py", line 128, in _get_response
response = self.process_exception_by_middleware(e, request)
File "/home/lynx/PycharmProjects/hello_world/venv/lib/python3.6/site-packages/django/core/handlers/base.py", line 126, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/home/lynx/PycharmProjects/hello_world/venv/lib/python3.6/site-packages/django/views/decorators/csrf.py", line 54, in wrapped_view
return view_func(*args, **kwargs)
File "/home/lynx/PycharmProjects/hello_world/venv/lib/python3.6/site-packages/django/views/generic/base.py", line 69, in view
return self.dispatch(request, *args, **kwargs)
File "/home/lynx/PycharmProjects/hello_world/venv/lib/python3.6/site-packages/rest_framework/views.py", line 483, in dispatch
response = self.handle_exception(exc)
File "/home/lynx/PycharmProjects/hello_world/venv/lib/python3.6/site-packages/rest_framework/views.py", line 443, in handle_exception
self.raise_uncaught_exception(exc)
File "/home/lynx/PycharmProjects/hello_world/venv/lib/python3.6/site-packages/rest_framework/views.py", line 471, in dispatch
self.initial(request, *args, **kwargs)
File "/home/lynx/PycharmProjects/hello_world/venv/lib/python3.6/site-packages/rest_framework/views.py", line 389, in initial
self.check_permissions(request)
File "/home/lynx/PycharmProjects/hello_world/venv/lib/python3.6/site-packages/rest_framework/views.py", line 322, in check_permissions
if not permission.has_permission(request, self):
File "/home/lynx/PycharmProjects/hello_world/venv/lib/python3.6/site-packages/rest_framework/permissions.py", line 141, in has_permission
queryset = self._queryset(view)
File "/home/lynx/PycharmProjects/hello_world/venv/lib/python3.6/site-packages/rest_framework/permissions.py", line 121, in _queryset
).format(self.__class__.__name__)
AssertionError: Cannot apply DjangoModelPermissionsOrAnonReadOnly on a view that does not set `.queryset` or have a `.get_queryset()` method.
[24/Jun/2018 14:34:41] "GET /articles/ HTTP/1.1" 500 101619
这是我的代码：
新闻/serializers.py：
from rest_framework import serializers
from .models import Article
class ArticleSerializer(serializers.ModelSerializer):
class Meta:
model = Article
fields = '__all__'
news / views.py ：
from django.shortcuts import get_object_or_404, render
from django.views import generic
from rest_framework.response import Response
from rest_framework.views import APIView
from .forms import ArticleForm, CommentForm, GuestForm
from .models import Article, Guest
from .serializers import ArticleSerializer
# Create your views here.
class ArticleList(generic.ListView):
template_name = 'news/article/list.html'
model = Article
context_object_name = 'articles'
def get_queryset(self):
return Article.objects.filter(status='published')
class ArticleDetail(generic.View):
template_name = 'news/article/detail.html'
comment_form = CommentForm
def get(self, request, pk):
article = get_object_or_404(Article,
pk=pk)
comments = article.comments
return render(request, self.template_name,
{'article': article,
'comments': comments,
'comment_form': self.comment_form})
def post(self, request, pk):
article = get_object_or_404(Article,
pk=pk)
comments = article.comments.filter(status='published')
form = self.comment_form(request.POST)
if form.is_valid():
comment = form.save(commit=False)
comment.article = article
comment.save()
return render(request, self.template_name,
{'article': article,
'comments': comments,
'comment_form': self.comment_form})
class GuestBook(generic.View):
template_name = 'news/guestbook/list.html'
guest_form = GuestForm
def get(self, request):
guests = Guest.objects.filter(status='published')
return render(request, self.template_name,
{'guests': guests,
'guest_form': self.guest_form})
def post(self, request):
guests = Guest.objects.filter(status='published')
form = self.guest_form(request.POST)
if form.is_valid():
form.save()
return render(request, self.template_name,
{'guests': guests,
'guest_form': self.guest_form})
class ArticleCreate(generic.View):
template_name = 'news/article_form.html'
article_form = ArticleForm
def get(self, request):
return render(request, self.template_name,
{'form': self.article_form})
class RESTArticleList(APIView):
def get(self, request):
articles = Article.objects.filter(status='published').all()
serializer = ArticleSerializer(articles, many=True)
return Response(serializer.data)
def post(self):
pass
hello_world / urls.py ：
"""hello_world URL Configuration
The `urlpatterns` list routes URLs to views. For more information please see:
https://docs.djangoproject.com/en/2.0/topics/http/urls/
Examples:
Function views
1. Add an import: from my_app import views
2. Add a URL to urlpatterns: path('', views.home, name='home')
Class-based views
1. Add an import: from other_app.views import Home
2. Add a URL to urlpatterns: path('', Home.as_view(), name='home')
Including another URLconf
1. Import the include() function: from django.urls import include, path
2. Add a URL to urlpatterns: path('blog/', include('blog.urls'))
"""
from django.conf import settings
from django.conf.urls.static import static
from django.contrib import admin
from django.urls import include, path
from news import views
from rest_framework.urlpatterns import format_suffix_patterns
urlpatterns = [
path('admin/', admin.site.urls),
path('news/', include('news.urls')),
path('tinymce/', include('tinymce.urls')),
path('articles/', views.RESTArticleList.as_view()),
]
urlpatterns = format_suffix_patterns(urlpatterns)
if settings.DEBUG:
urlpatterns += static(settings.STATIC_URL, document_root=settings.STATIC_ROOT)
urlpatterns += static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)
我正在寻求帮助！
答案 0 :(得分：1)
来自docs：
此权限只能应用于设置了.queryset属性的视图。
因此，尝试将queryset属性添加到您的RESTArticleList视图中：
class RESTArticleList(APIView):
queryset = Article.objects.filter(status='published')
def get(self, request):
articles = Article.objects.filter(status='published').all()
serializer = ArticleSerializer(articles, many=True)
return Response(serializer.data)
def post(self):
pass