Django Rest API仅显示一些网址

问题描述

我已使用Django教程创建了民意调查应用，并再次在该教程中添加了REST API。

我认为我的urlpatterns配置中某处出错，因为我只能看到一些页面，其余页面给我一个错误。

我的根url.py：

from django.urls import path,include
from polls import views,viewsets

urlpatterns = [
    path('',include('polls.urls')),path('polls/',include('polls.urls',namespace="polls")),path('admin/',admin.site.urls),]

urlpatterns += [
    path('api-auth/',include('rest_framework.urls')),]

我的应用级url.py：

from . import views,viewsets
from .viewsets import QuestionViewSet,UserViewSet,ResultsViewSet
from rest_framework import renderers
from rest_framework.routers import DefaultRouter

router = DefaultRouter()
router.register(r'questions',viewsets.QuestionViewSet)
router.register(r'users',viewsets.UserViewSet)
router.register(r'results',viewsets.ResultsViewSet)

app_name = 'polls'
urlpatterns = [
    path('',views.IndexView.as_view(),name='index'),path('<int:pk>/',views.DetailView.as_view(),name='detail'),path('<int:pk>/results/',views.ResultsView.as_view(),name='results'),path('<int:question_id>/Vote/',views.Vote,name='Vote'),path('',include(router.urls)),]

viewsets.py：

from django.utils import timezone
from .models import Choice,Question
from .serializers import QuestionSerializer,UserSerializer,ChoiceSerializer
from rest_framework import generics
from django.contrib.auth.models import User
from rest_framework import permissions
from .permissions import IsOwnerOrReadOnly
from rest_framework.decorators import api_view
from rest_framework.response import Response
from rest_framework.reverse import reverse
from rest_framework import viewsets

class QuestionViewSet(viewsets.ModelViewSet):
    queryset = Question.objects.filter(pub_date__lte=timezone.Now()).order_by('-pub_date')
    serializer_class = QuestionSerializer
    permission_classes = [permissions.IsAuthenticatedOrReadOnly,IsOwnerOrReadOnly]

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

class UserViewSet(viewsets.ReadOnlyModelViewSet):
    queryset = User.objects.all()
    serializer_class = UserSerializer

class ResultsViewSet(viewsets.ModelViewSet):
    queryset = Choice.objects.all()
    serializer_class = ChoiceSerializer
    permission_classes = [permissions.IsAuthenticatedOrReadOnly,serializer):
        serializer.save(owner=self.request.user)

@api_view(['GET'])
def api_root(request,format=None):
    return Response({
        'users': reverse('user-list',request=request,format=format),'questions': reverse('question-list',})

views.py：

from django.shortcuts import render,get_object_or_404
from django.urls import reverse
from django.views import generic
from django.utils import timezone

from .models import Choice,Question

class IndexView(generic.ListView):
    template_name = 'polls/index.html'
    context_object_name = 'latest_question_list'
    def get_queryset(self):
        return Question.objects.filter(
            pub_date__lte=timezone.Now()
        ).order_by('-pub_date')[:5]

class DetailView(generic.DetailView):
    model = Question
    template_name = 'polls/detail.html'

    def get_queryset(self):
        #excludes any questions that aren't published yet.
        return Question.objects.filter(pub_date__lte=timezone.Now())

class ResultsView(generic.DetailView):
    model = Question
    template_name = 'polls/results.html'

def Vote(request,question_id):
    question = get_object_or_404(Question,pk=question_id)
    try:
        selected_choice = question.choice_set.get(pk=request.POST['choice'])
    except (KeyError,Choice.DoesNotExist):
        return render(request,'polls/detail.html',{
            'question': question,'error_message': "You didn't select a choice.",})
    else:
        selected_choice.Votes += 1
        selected_choice.save()
        return HttpResponseRedirect(reverse('polls:results',args=(question.id,)))

models.py：

from django.db import models
from django.utils import timezone

class Question(models.Model):
    question_text = models.CharField(max_length=200)
    pub_date = models.DateTimeField('date published')
    owner = models.ForeignKey('auth.User',related_name='questions',null=True,blank=True,on_delete=models.CASCADE)

    def __str__(self):
        return self.question_text
    
    def was_published_recently(self):
        Now = timezone.Now()
        return Now - datetime.timedelta(days=1) <= self.pub_date <= Now

    was_published_recently.admin_order_field = 'pub_date'
    was_published_recently.boolean = True
    was_published_recently.short_description = 'Published recently?'

    def create(self,validated_data):
        return Question.objects.create(**validated_data)

    def update(self,instance,validated_data):
        instance.question_text = validated_data.get('question_text',instance.question_text)
        instance.save()
        return instance

    def save(self,*args,**kwargs):
        super(Question,self).save(*args,**kwargs)

class Choice(models.Model):
    question = models.ForeignKey(Question,on_delete=models.CASCADE)
    choice_text = models.CharField(max_length=200)
    Votes = models.IntegerField(default=0)
    owner = models.ForeignKey('auth.User',related_name='choices',on_delete=models.CASCADE)
    
    def __str__(self):
        return self.choice_text

可以使用的网址：

http：// localhost：8000 /

http：// localhost：8000 / polls /

http：// localhost：8000 / polls / 1 /

http：// localhost：8000 / polls / 1 / results /

http：// localhost：8000 / polls / 1 / Vote /

http：// localhost：8000 / users /（为什么这仅作为与API相关的链接？！）

http：// localhost：8000 / api-auth / login /

http：// localhost：800 / admin /

网址不正确：

http：// localhost：8000 / questions /

http：// localhost：8000 / results /

---

如果您需要查看其他任何代码，请告诉我。

谢谢！

解决方法

当Django向您显示网址时，表示您输入了错误的网址。
例如，当您想打开管理页面时，应输入： 网址中的localhost：8000 / admin /
我认为你应该使用

http://localhost:8000/polls/questions/

代替http://localhost:8000/questions/