Django 3.0:在/polls/1/{url'polls:vote'question.id}找不到页面

Question

我被Django的官方教程难住了（见a1）

我得到以下错误：

在这个Django项目中，在我正在制作的民意测验应用程序中，我们应该在views.py中创建一个vote()视图，它应该处理民意测验的请求后数据，并将我们重定向到results()视图（没有vote()视图的模板，它只是负责处理我们通过民意测验发送的数据）。起初我以为我有一个打字错误，但后来我直接复制粘贴了文档教程中的所有内容（我在这个问题的开头链接了这个教程），错误仍然存在

我的应用程序目录结构如下所示：

（尽管存在错误，VSCode无法识别Django的ORM查询，仅此而已）

我的urls.py文件如下所示：

from django.urls import path

from . import views

app_name = 'polls'
urlpatterns = [
    path('', views.index, name='index'),
    path('<int:question_id>/', views.detail, name='detail'),
    path('<int:question_id>/results/', views.results, name='results'),
    path('<int:question_id>/vote/', views.vote, name='vote'),
]

我的views.py看起来像这样：

from django.http import Http404, HttpResponse, HttpResponseRedirect
from django.shortcuts import render, get_object_or_404
from django.urls import reverse

from .models import Choice, Question


def index(request):
    latest_question_list = Question.objects.order_by('-pub_date')[:5]
    context = {'latest_question_list': latest_question_list}
    return render(request, 'polls/index.html', context)

def detail(request, question_id):
    try:
        question = Question.objects.get(pk=question_id)
    except Question.DoesNotExist:
        raise Http404("Question does not exist")
    return render(request, 'polls/detail.html', {'question': question})

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):
        # Redisplay the question voting form.
        return render(request, 'polls/detail.html', {
            'question': question,
            'error_message': "You didn't select a choice.",
        })
    else:
        selected_choice.votes += 1
        selected_choice.save()
        # Always return an HttpResponseRedirect after successfully dealing
        # with POST data. This prevents data from being posted twice if a
        # user hits the Back button.
        return HttpResponseRedirect(reverse('polls:results', args=(question.id)))

def results(request, question_id):
    question = get_object_or_404(Question, pk=question_id)
    return render(request, 'polls/results.html', {'question': question})

我的details.html模板（我在其中投票，应该让我重定向到结果页面）如下所示：

<h1>{{ question.question_text }}</h1>

{% if error_message %}<p><strong>{{ error_message }}</strong></p>{% endif %}

<form action="{% url 'polls:vote' question.id %}" method="POST">
{% csrf_token %}
{% for choice in question.choice_set.all %}
    <input type="radio" name="choice" id="choice{{ forloop.counter }}" value="{{ choice.id }}">
    <label for="choice{{ forloop.counter }}">{{ choice.choice_text }}</label><br>
{% endfor %}
<input type="submit" value="Vote">
</form>

我应该访问的results.html模板如下所示：

<h1>{{ question.question_text }}</h1>

<ul>
{% for choice in question.choice_set.all %}
    <li>{{ choice.choice_text }} -- {{ choice.votes }} vote{{ choice.votes|pluralize }}</li>
{% endfor %}
</ul>

<a href="{% url 'polls:detail' question.id %}">Vote again?</a>