NoReverseMatch at/polls/

我正在通过看Django教程来坐在网上。我得到了一个错误：NoReverseMatch at/polls/

NoReverseMatch at /polls/ Reverse for 'index' with no arguments not found. 1 pattern(s) tried: ['$/'].

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base.html文件是在为同父的应用写道就像

{% 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'), 
]

孩子应用程序，其名称是投票就像是

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这个错误happens.Is指定"{% url 'index' %}"错误的方式urls.py？我怎样才能解决这个问题？

我views.py就像

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

来源

2017-08-25 user8504021

url（r'^ $ /'，index，name ='index'），这两个url文件。我认为这造成了问题 – Ananthu

@Ananthu thx，我删除了每个url（r'^ $ /'，index，name ='index'），但是它们都发生错误。我该如何解决这个问题？ – user8504021

尝试修复正则表达式的URL到这个：'url（r'^ $'，index，name ='index'），'不带'/' – neverwalkaloner

您有重复的网址及网址名称index的复制，尝试修复它

例如在民意调查.urls

urlpatterns = [ 
    url(r'^$', TemplateView.as_view(template_name='app/index.html'), name='app_index'), 
    url(r'(?P<pk>\d+)/$', 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'^form$', views.form_test), 
]

在urls.py

urlpatterns = [ 
    url(r'^$',index,name='index'), 
    url(r'^admin/', admin.site.urls), 
    url(r'^polls/',include('polls.urls')), 
]

urls（ “Django的贯穿每个URL模式，从而，在所请求的URL匹配的第一个停止。”）

来源

2017-08-25 12:32:14

thx，我该如何解决？我应该添加＃^^^^？ – user8504021

@ user8504021我编辑答案，例如，但你需要检查逻辑 –

thx，我固定为你写的，但TemplateDoesNotExist在/ polls/ 模板/ polls/index.html错误发生。我写的url（r'^ $ '，TemplateView.as_view（template_name ='templates/polls/index.html'），name ='app_index'），。我更新了目录，所以如果你知道什么，请告诉我。 – user8504021

在您urls.py文件有不同的意见相同的网址。 Django只会考虑第一个url。删除

 url(r'^$/',index,name='index'),

从父就能解决问题

来源

2017-08-25 12:35:55 Ananthu

thx，我删除了父母的索引url，但NoReverseMatch在/民意调查/ 找不到'索引'的反向。 'index'不是有效的视图函数或模式名称。错误发生。我该如何解决这个问题？ – user8504021

对不起，你应该使用url（r'^ $ /'，views.index，name ='index'）， – Ananthu

更新问题与views.py – Ananthu

好了，你没有重复的URL，因为你用的应用程序工作，所以这个问题是在这里url(r'^$/',这是错误的正确方法是url(r'^$'的原因是你总是必须在URL的末尾设置$，试试这个，并告诉我

来源

2017-08-25 12:52:16

它没有工作... – user8504021

那么可能你没有索引视图或导入是错误的 –

NoReverseMatch at/polls/

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