Django viewset没有属性'get_extra_actions'

Question

我正在使用Django第一次,我正在尝试构建一个API,我正在关注一些教程和示例,它运行正常,但我现在在安装所有需求和项目之后在Raspberry Pi中运行项目失败,出现以下错误:

    Performing system checks...

Unhandled exception in thread started by <function check_errors.<locals>.wrapper at 0xb547adb0>
Traceback (most recent call last):
  File "/home/pi/.local/lib/python3.5/site-packages/django/utils/autoreload.py", line 225, in wrapper
    fn(*args, **kwargs)
  File "/home/pi/.local/lib/python3.5/site-packages/django/core/management/commands/runserver.py", line 120, in inner_run
    self.check(display_num_errors=True)
  File "/home/pi/.local/lib/python3.5/site-packages/django/core/management/base.py", line 364, in check
    include_deployment_checks=include_deployment_checks,
  File "/home/pi/.local/lib/python3.5/site-packages/django/core/management/base.py", line 351, in _run_checks
    return checks.run_checks(**kwargs)
  File "/home/pi/.local/lib/python3.5/site-packages/django/core/checks/registry.py", line 73, in run_checks
    new_errors = check(app_configs=app_configs)
  File "/home/pi/.local/lib/python3.5/site-packages/django/core/checks/urls.py", line 13, in check_url_config
    return check_resolver(resolver)
  File "/home/pi/.local/lib/python3.5/site-packages/django/core/checks/urls.py", line 23, in check_resolver
    return check_method()
  File "/home/pi/.local/lib/python3.5/site-packages/django/urls/resolvers.py", line 397, in check
    for pattern in self.url_patterns:
  File "/home/pi/.local/lib/python3.5/site-packages/django/utils/functional.py", line 36, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/home/pi/.local/lib/python3.5/site-packages/django/urls/resolvers.py", line 536, in url_patterns
    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
  File "/home/pi/.local/lib/python3.5/site-packages/django/utils/functional.py", line 36, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/home/pi/.local/lib/python3.5/site-packages/django/urls/resolvers.py", line 529, in urlconf_module
    return import_module(self.urlconf_name)
  File "/usr/lib/python3.5/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 986, in _gcd_import
  File "<frozen importlib._bootstrap>", line 969, in _find_and_load
  File "<frozen importlib._bootstrap>", line 958, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 673, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 673, in exec_module
  File "<frozen importlib._bootstrap>", line 222, in _call_with_frames_removed
  File "/home/pi/Projects/openvpn-monitor/openvpnmonitor/urls.py", line 24, in <module>
    url(r'^api/', include('openvpnmonitor.api.urls')),
  File "/home/pi/.local/lib/python3.5/site-packages/django/urls/conf.py", line 34, in include
    urlconf_module = import_module(urlconf_module)
  File "/usr/lib/python3.5/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 986, in _gcd_import
  File "<frozen importlib._bootstrap>", line 969, in _find_and_load
  File "<frozen importlib._bootstrap>", line 958, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 673, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 673, in exec_module
  File "<frozen importlib._bootstrap>", line 222, in _call_with_frames_removed
  File "/home/pi/Projects/openvpn-monitor/openvpnmonitor/api/urls.py", line 16, in <module>
    urlpatterns += router.urls
  File "/home/pi/.local/lib/python3.5/site-packages/rest_framework/routers.py", line 101, in urls
    self._urls = self.get_urls()
  File "/home/pi/.local/lib/python3.5/site-packages/rest_framework/routers.py", line 363, in get_urls
    urls = super(DefaultRouter, self).get_urls()
  File "/home/pi/.local/lib/python3.5/site-packages/rest_framework/routers.py", line 261, in get_urls
    routes = self.get_routes(viewset)
  File "/home/pi/.local/lib/python3.5/site-packages/rest_framework/routers.py", line 176, in get_routes
    extra_actions = viewset.get_extra_actions()
AttributeError: type object 'SessionViewSet' has no attribute 'get_extra_actions'

我的views.py包含以下代码:

from django.shortcuts import render

from rest_framework import viewsets
from .models import Session
from .serializers import SessionSerializer

from rest_framework.views import APIView, Response


class SessionViewSet(APIView):
    queryset = Session.objects.all()
    serializer_class = SessionSerializer

    def get(self, request, format=None):
        return Response("test")

我真的不知道为什么我的笔记本电脑上工作但它不能用于我的Raspberry Pi.

这是发生在某人或任何人都知道为什么会发生这种情况？

非常感谢!

编辑:

这是我的urls.py

from django.conf.urls import url
from rest_framework import routers
from openvpnmonitor.api.views import SessionViewSet

router = routers.DefaultRouter()
router.register(r'sessions', SessionViewSet)

urlpatterns = [
    url(r'sessions', SessionViewSet.as_view()),
    url(r'^docs/', schema_view),
]

urlpatterns += router.urls

Answer 1

你称它为一个视图集,但这并不是一个视图集; 你继承自APIView,它是一个独立的通用视图,而不是一个视图集.

视图集需要从viewsets.ViewSet继承.

Answer 2

为了：

djangorestframework==3.11.0
Django==2.2.9

您需要更改class SessionViewSet(APIView): 为：

from rest_framework import mixins, viewsets

class SessionViewSet(mixins.ListModelMixin,
                     viewsets.GenericViewSet):

让它工作。DRF 的内部结构发生了一些变化，其他解决方案不会再削减它。

Answer 3

在Django Rest Framework v3.8之前,您可以APIView直接向路由器注册.我做了很多,为一些非常自定义的API端点获得了一个很好的整理(和版本化)自动记录API .再次选择,我可能会以更标准的方式编写整个事情,但这不是每个人的选择.

但是在深入研究错误之后,事实证明你可以通过给路由器提供它想要的东西来修补问题并添加一个虚拟的get_extra_actions类方法.

class MyAPIView(APIView):

    @classmethod
    def get_extra_actions(cls):
        return []

#...

我不是说这很好,但它现在有效.
我已经拿回了我的文档,我已经设法升级到DRFv3.8.