/api/questions/ 'list' 对象的 TypeError 不可调用

Question

当我去这个 http://127.0.0.1:8000/api/questions/ 我得到

/api/questions/ 处的类型错误

'list' 对象不可调用

urls.py

​​>

（在项目中）

"""QuestionTime URL Configuration

The `urlpatterns` list routes URLs to views. For more information please see:
    https://docs.djangoproject.com/en/3.2/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.contrib import admin
from django.urls import include, path, re_path

from django_registration.backends.one_step.views import RegistrationView

from core.views import IndexTemplateView
from users.forms import CustomUserForm

# https://django-registration.readthedocs.io/en/3.1.2/activation-workflow.html

urlpatterns = [
    path('admin/', admin.site.urls),

    path("accounts/register/", RegistrationView.as_view(
         form_class=CustomUserForm,
         success_url="/",
         ), name="django_registration_register"),

    path("accounts/", include("django_registration.backends.one_step.urls")),

    path("accounts/", include("django.contrib.auth.urls")),

    path("api/", include("users.api.urls")),

    path("api/", include("questions.api.urls")),

    path("api-auth/", include("rest_framework.urls")),

    path("api/rest-auth/", include("rest_auth.urls")),

    path("api/rest-auth/registration/", include("rest_auth.registration.urls")),

    re_path(r"^.*$", IndexTemplateView.as_view(), name="entry-point"),
]

urls.py

​​>

（在 appName1/api 中

from django.urls import include, path
from rest_framework import urlpatterns
from rest_framework.routers import DefaultRouter

from questions.api import views as qv

router = DefaultRouter()
router.register(r"questions", qv.QuestionViewSet)

urlpatterns = [
    path("", include(router.urls)), 

    path("questions/<slug:slug>/answers/", qv.AnswerListAPIView.as_view(), name="answer-list"),

    path("questions/<slug:slug>/answer/", qv.AnswerCreateAPIView.as_view(), name="answer-create"),

    path("answers/<int:pk>/", qv.AnswerRUDAPIView.as_view(), name="answer-detail"),

    path("answers/<int:pk>/like/", qv.AnswerLikeAPIView.as_view(), name="answer-like"),
]

views.py

​​>

（在 appName1/api 中） 仅显示 QuestionViewSet

class QuestionViewSet(viewsets.ModelViewSet):
queryset = Question.objects.all()
lookup_field = "slug"
serializer_class = QuestionSerializer
permission_classes = [IsAuthenticated, IsAuthorOrReadOnly]

def perform_create(self, serializer):
    serializer.save(author=self.request.user)

来自 settings.py

​​>

REST_FRAMEWORK = {
    'DEFAULT_AUTHENTICATION_CLASSES': (
        'rest_framework.authentication.TokenAuthentication',
        'rest_framework.authentication.SessionAuthentication',
    ),
    'DEFAULT_PERMISSION_CLASSES': (
        'rest_framework.permissions.IsAuthenticated',
    ),
    'DEFAULT_PAGINATION_CLASS': (
        'rest_framework.pagination.PageNumberPagination',
    ),
    'PAGE_SIZE': 2,
}

错误可能来自其他地方。

我不知道在哪里可以找到“列表”。

appName1 = 问题

异常位置：lib/python3.9/site-packages/rest_framework/generics.py，第 162 行，在分页器中

Answer 1

DEFAULT_PAGINATION_CLASS 设置应该是字符串而不是元组/列表

REST_FRAMEWORK = {
    ...
    'DEFAULT_PAGINATION_CLASS': 'rest_framework.pagination.PageNumberPagination',
    ...
}