当我遇到这个问题时，我正在关注Django教程
我试图复制粘贴并一次又一次地阅读教程，但我无法修复它。
错误是：＆＃34;反转＆＃39;详细信息＆＃39;未找到。 ＆＃39;细节＆＃39;不是有效的视图函数或模式名称。＆＃34;
错误追溯：
Environment:
Request Method: GET
Request URL: http://127.0.0.1:8000/polls/
Django Version: 2.0.3
Python Version: 3.5.2
Installed Applications:
['polls',
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware']
Template error:
In template /home/cristian/Desktop/build/polls/templates/polls/index.html, error at line 1
Reverse for 'detail' with arguments '('',)' not found. 1 pattern(s) tried: ['polls\\/(?P<question_id>[0-9]+)\\/$']
1 : <li><a href=" {% url 'detail' question.id %} ">{{ question.question_text }}</a></li>
Traceback:
File "/home/cristian/.local/lib/python3.5/site-packages/django/core/handlers/exception.py" in inner
35. response = get_response(request)
File "/home/cristian/.local/lib/python3.5/site-packages/django/core/handlers/base.py" in _get_response
128. response = self.process_exception_by_middleware(e, request)
File "/home/cristian/.local/lib/python3.5/site-packages/django/core/handlers/base.py" in _get_response
126. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/home/cristian/Desktop/build/polls/views.py" in index
10. return render(request, 'polls/index.html', context)
File "/home/cristian/.local/lib/python3.5/site-packages/django/shortcuts.py" in render
36. content = loader.render_to_string(template_name, context, request, using=using)
File "/home/cristian/.local/lib/python3.5/site-packages/django/template/loader.py" in render_to_string
62. return template.render(context, request)
File "/home/cristian/.local/lib/python3.5/site-packages/django/template/backends/django.py" in render
61. return self.template.render(context)
File "/home/cristian/.local/lib/python3.5/site-packages/django/template/base.py" in render
175. return self._render(context)
File "/home/cristian/.local/lib/python3.5/site-packages/django/template/base.py" in _render
167. return self.nodelist.render(context)
File "/home/cristian/.local/lib/python3.5/site-packages/django/template/base.py" in render
943. bit = node.render_annotated(context)
File "/home/cristian/.local/lib/python3.5/site-packages/django/template/base.py" in render_annotated
910. return self.render(context)
File "/home/cristian/.local/lib/python3.5/site-packages/django/template/defaulttags.py" in render
447. url = reverse(view_name, args=args, kwargs=kwargs, current_app=current_app)
File "/home/cristian/.local/lib/python3.5/site-packages/django/urls/base.py" in reverse
88. return iri_to_uri(resolver._reverse_with_prefix(view, prefix, *args, **kwargs))
File "/home/cristian/.local/lib/python3.5/site-packages/django/urls/resolvers.py" in _reverse_with_prefix
632. raise NoReverseMatch(msg)
Exception Type: NoReverseMatch at /polls/
Exception Value: Reverse for 'detail' with arguments '('',)' not found. 1 pattern(s) tried: ['polls\\/(?P<question_id>[0-9]+)\\/$']
views.py：
from django.shortcuts import get_object_or_404, render
from django.http import HttpResponseRedirect
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):
question = get_object_or_404(Question, pk=question_id)
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})
models.py
import datetime
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', null=True)
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
urls.py
from django.urls import path
from . import views
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'),
]
的index.html
<li><a href="{% url 'detail' question.id %}">{{ question.question_text }}</a></li>
detail.html
<h1>{{ question.question_text }}</h1>
{% if error_message %}<p><strong>{{ error_message }}</strong></p>{% endif %}
<form action={% url 'polls:vote' poll.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>
我希望你能帮助我，谢谢。
答案 0 :(得分：1)
错误发生在index.html
中<li><a href="{% url 'detail' question.id %}">{{ question.question_text }}</a></li>
删除index.html中的url详细信息并将其放在details.html中。正如您所看到的，网址调度程序找不到您的网址，因为没有可用的投票ID。