我正在使用Windows XP，Python 3.4和Django 2.0.2
我是Django的新手，正在尝试按照
中的说明进行操作https://docs.djangoproject.com/en/2.0/intro/tutorial04/
Django教程。我最可能犯的错误是我没有切 并将代码粘贴到正确的位置。这对我有帮助（可能 其他），如果本教程的作者引用了以下内容的完整列表： 每个阶段的py和html文件（不仅仅是代码的一部分）。
我遇到以下错误：
`
/ polls /
处的NoReverseMatch
找不到“详细信息”的相反内容。 'detail'不是有效的视图函数或模式名称。
请求方法：GET
要求网址：http://127.0.0.1:8000/polls/
Django版本：2.0.2
异常类型：NoReverseMatch
异常值：
找不到“详细信息”的相反内容。 'detail'不是有效的视图函数或模式名称。
异常位置：_reverse_with_prefix中的C：\ programs \ python34 \ lib \ site-packages \ django \ urls \ resolvers.py，行632
Python可执行文件：C：\ programs \ python34 \ python.exe
Python版本：3.4.3
Python路径：
['Y：\ mysite \ mysite'，
'C：\ WINDOWS \ system32 \ python34.zip'，
'C：\ programs \ python34 \ DLLs'，
'C：\ programs \ python34 \ lib'，
'C：\ programs \ python34'，
'C：\ programs \ python34 \ lib \ site-packages']
服务器时间：2018年12月6日，星期四15:35:56 -0600
模板渲染期间发生错误
在模板Y：\ mysite \ mysite \ polls \ templates \ polls \ index.html中，第4行错误
找不到“详细信息”的相反内容。 'detail'不是有效的视图函数或模式名称。
1 {% if latest_question_list %}
2 <ul>
3 {% for question in latest_question_list %}
4 <li><a href="{% url 'detail' question.id %}">{{ question.question_text }}</a></li>
5 {% endfor %}
6 </ul>
7 {% else %}
8 <p>No polls are available.</p>
9 {% endif %}
`
读取的错误流结尾
raise NoReverseMatch(msg)
django.urls.exceptions.NoReverseMatch: Reverse for 'detail' not found. 'detail'
is not a valid view function or pattern name.
[06/Dec/2018 15:35:57] "GET /polls/ HTTP/1.1" 500 127035
Not Found: /favicon.ico
[06/Dec/2018 15:35:58] "GET /favicon.ico HTTP/1.1" 404 2078
在学习本教程之后，我有以下文件：
Y：\ mysite \ mysite \ polls \ models.py
from django.db import models
class Question(models.Model):
question_text = models.CharField(max_length=200)
pub_date = models.DateTimeField('date published')
def __str__(self):
return self.question_text
def was_published_recently(self):
return self.pub_date >= timezone.now() - datetime.timedelta(days=1)
class Choice(models.Model):
question = models.ForeignKey(Question, on_delete=models.CASCADE)
choice_text = models.CharField(max_length=200)
votes = models.IntegerField(default=0)
def __str__(self):
return self.choice_text
Y：\ mysite \ mysite \ polls \ urls.py
from django.urls import path
from . import views
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'),
]
Y：\ mysite \ mysite \ polls \ views.py
from django.http import HttpResponse, HttpResponseRedirect
from django.shortcuts import get_object_or_404, render
from django.urls import reverse
from .models import Question
from django.views import generic
class IndexView(generic.ListView):
template_name = 'polls/index.html'
context_object_name = 'latest_question_list'
def get_queryset(self):
"""Return the last five published questions."""
return Question.objects.order_by('-pub_date')[:5]
class DetailView(generic.DetailView):
model = Question
template_name = 'polls/detail.html'
class ResultsView(generic.DetailView):
model = Question
template_name = 'polls/results.html'
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 results(request, question_id):
question = get_object_or_404(Question, pk=question_id)
return render(request, 'polls/results.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,))
Y：\ mysite \ mysite \ polls \ templates \ polls \ detail.html
<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>
Y：\ mysite \ mysite \ polls \ templates \ polls \ index.html
`
{% if latest_question_list %}
<ul>
{% for question in latest_question_list %}
<li><a href="{% url 'detail' question.id %}">{{ question.question_text }}</a></li>
{% endfor %}
</ul>
{% else %}
<p>No polls are available.</p>
{% endif %}
`
Y：\ mysite \ mysite \ polls \ templates \ polls \ results.html
<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>
有人可以告诉我我在做什么吗？
我所有的HTML和PY文件都是从
Django Tutorial.
如果有人建议更改PY文件的HTML，那将非常
如果该人列出了完整的修改文件（而不仅仅是
变化）。
谢谢！
答案 0 :(得分：0)
代替
<li><a href="{% url 'detail' question.id %}">{{ question.question_text }}</a></li>
使用
<li><a href="{% url 'polls:detail' question.id %}">{{ question.question_text }}</a></li>
因为民意调查应用程序的网址包含在urlpatterns（与urls.py位于同一文件夹中）的settings.py中，所以名称为polls，
urlpatterns = [
...
path('', include('polls.url', name='polls')
]