【发布时间】：2018-02-03 12:01:33
【问题描述】：
我正在通过查看 Django 教程进行网络坐席。 我收到一个错误：
NoReverseMatch at /polls/ Reverse for 'index' with no arguments not 成立。尝试了 1 种模式：['$/']。
回溯说
Traceback:
File "/Users/XXX/django/django/core/handlers/exception.py" in inner
35. response = get_response(request)
File "/Users/XXX/django/django/core/handlers/base.py" in _get_response
130. response = self.process_exception_by_middleware(e, request)
File "/Users/XXX/django/django/core/handlers/base.py" in _get_response
128. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/Users/XXX/djangostudy/polls/views.py" in index
23. 'questions': Question.objects.all(),
File "/Users/XXX/django/django/shortcuts.py" in render
36. content = loader.render_to_string(template_name, context, request, using=using)
File "/Users/XXX/django/django/template/loader.py" in render_to_string
62. return template.render(context, request)
File "/Users/XXX/django/django/template/backends/django.py" in render
61. return self.template.render(context)
File "/Users/XXX/django/django/template/base.py" in render
175. return self._render(context)
File "/Users/XXX/django/django/template/base.py" in _render
167. return self.nodelist.render(context)
File "/Users/XXX/django/django/template/base.py" in render
943. bit = node.render_annotated(context)
File "/Users/XXX/django/django/template/base.py" in render_annotated
910. return self.render(context)
File "/Users/XXX/django/django/template/loader_tags.py" in render
155. return compiled_parent._render(context)
File "/Users/XXX/django/django/template/base.py" in _render
167. return self.nodelist.render(context)
File "/Users/XXX/django/django/template/base.py" in render
943. bit = node.render_annotated(context)
File "/Users/XXX/django/django/template/base.py" in render_annotated
910. return self.render(context)
File "/Users/XXX/django/django/template/loader_tags.py" in render
155. return compiled_parent._render(context)
File "/Users/XXX/django/django/template/base.py" in _render
167. return self.nodelist.render(context)
File "/Users/XXX/django/django/template/base.py" in render
943. bit = node.render_annotated(context)
File "/Users/XXX/django/django/template/base.py" in render_annotated
910. return self.render(context)
File "/Users/XXX/django/django/template/defaulttags.py" in render
447. url = reverse(view_name, args=args, kwargs=kwargs, current_app=current_app)
File "/Users/XXX/django/django/urls/base.py" in reverse
87. return iri_to_uri(resolver._reverse_with_prefix(view, prefix, *args, **kwargs))
File "/Users/XXX/django/django/urls/resolvers.py" in _reverse_with_prefix
488. raise NoReverseMatch(msg)
Exception Type: NoReverseMatch at /polls/
Exception Value: Reverse for 'index' with no arguments not found. 1 pattern(s) tried: ['$/']
我写在base.html中，它和父母的应用一样
{% load staticfiles %}
{% load bootstrap3 %}
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags -->
<meta name="description" content="">
<meta name="author" content="">
<link rel="icon" href="../../favicon.ico">
<title>Starter Template for Bootstrap</title>
<!-- Bootstrap core CSS -->
<link href="static/css/bootstrap.min.css" rel="stylesheet">
<style type="text/css">
body {
padding-top: 50px;
}
</style>
</head>
<body>
<nav class="navbar navbar-inverse navbar-fixed-top">
<div class="container">
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="{% url 'index' %}">Tutorial</a>
</div>
<div id="navbar" class="collapse navbar-collapse">
<ul class="nav navbar-nav">
<li class="{% block nav_polls %}{% endblock %}"><a href="{% url 'polls:index' %}">polls</a></li>
<li class=""><a href="{% url 'admin:index' %}">admin</a></li>
</ul>
</div><!--/.nav-collapse -->
</div>
</nav>
<div class="container">
{% bootstrap_messages messages %}
{% block contents %}{% endblock %}
</div><!-- /.container -->
<!-- Bootstrap core JavaScript
================================================== -->
<!-- Placed at the end of the document so the pages load faster -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
<script>window.jQuery || document.write('<script src="../../assets/js/vendor/jquery.min.js"><\/script>')</script>
<script src="{% static 'js/bootstrap.min.js' %}"></script>
</body>
</html>
父母目录的urls.py是
from django.conf.urls import include,url
from django.contrib import admin
from polls.views import index
urlpatterns = [
url(r'^admin/', admin.site.urls),
url(r'^polls/',include('polls.urls')),
url(r'^$/',index,name='index'),
]
名为 polls 的子应用的 urls.py 是这样的
from django.conf.urls import url
from django.views.generic import TemplateView
from . import views
app_name="polls"
urlpatterns = [
url(r'^$',views.index,name='index'),
url(r'(?P<pk>\d+)/$', views.detail, name='poll_detail'),
url(r'(?P<pk>\d+)/vote$', views.vote, name='poll_vote'),
url(r'(?P<pk>\d+)/results$', views.results, name='poll_results'),
url(r'^$',TemplateView.as_view(template_name='app/index.html'),name='app_index'),
url(r'^form$', views.form_test),
]
我真的不明白为什么会发生这个错误。指定"{% url 'index' %}"的方式是错误的吗？我该如何解决这个问题？
我的views.py是这样的
from django.shortcuts import render
from django.urls import reverse_lazy
from django.utils.html import mark_safe
from .models import Question
from django.http import HttpResponse
from django.shortcuts import Http404
from django.shortcuts import get_object_or_404,redirect
from .models import Choice
from django.views.generic import TemplateView
from django.views.generic import DetailView
from django.views.generic import ListView
from .forms import MyForm
from .forms import VoteForm
from django.views.generic import FormView
from django.views.generic.detail import SingleObjectMixin
from django.shortcuts import resolve_url
def index(request):
return render(request,'polls/index.html',{
'questions': Question.objects.all(),
})
def vote(request,pk):
question = get_object_or_404(Question,pk=pk)
try:
selected_choice = question.choice_set.get(pk=request.POST['choice'])
except (KeyError,Choice.DoesNotExist):
return render(request,'poll/detail.html',{
'question':question,
'error_message':"You didn't select a choice",
})
else:
selected_choice.votes += 1
selected_choice.save()
return redirect('index')
return redirect('poll_results', pk)
# pass
def results(request,pk):
obj = get_object_or_404(Question,pk=pk)
return render(request,'polls/results.html',{
'question':obj,
})
class FormTest(FormView):
form_class = MyForm
template_name = 'polls/form.html'
success_url = reverse_lazy('polls:index')
form_test = FormTest.as_view()
class Detail(SingleObjectMixin,FormView):
model = Question
form_class = VoteForm
context_object_name = 'question'
template_name = 'polls/detail.html'
def get(self, request, *args, **kwargs):
self.object = self.get_object()
return super().post(request, *args, **kwargs)
def post(self, request, *args, **kwargs):
self.object = self.get_object()
return super().post(request, *args, **kwargs)
def get_form_kwargs(self):
kwargs = super().get_form_kwargs()
kwargs['question'] = self.object
return kwargs
def form_valid(self, form):
form.vote()
return super().form_valid(form)
def get_success_url(self):
return resolve_url('polls:results',self.kwargs['pk'])
detail = Detail.as_view()
我的目录是 directory
【问题讨论】：
-
url(r'^$/',index,name='index')，在两个 url 文件上。我认为这会造成问题
-
@Ananthu thx，我删除了每个 url(r'^$/',index,name='index')，但是它们都发生了错误。我应该怎么做才能解决这个问题？跨度>
-
尝试将 url 的正则表达式修复为：
url(r'^$',index,name='index'),without/