NoReverseMatch at/polls/

我正在通過看Django教程來坐在網上。我得到了一個錯誤：NoReverseMatch at/polls/

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

回溯說

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文件是在爲同父的應用寫道就像

{% 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>

父母目錄的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'), 
]

孩子應用程序，其名稱是投票就像是

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), 
]

我真的不明白爲什麼這個錯誤happens.Is指定"{% url 'index' %}"錯誤的方式urls.py？我怎樣才能解決這個問題？

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()

我的目錄是 directory

來源

2017-08-25 user8504021

url（r'^ $ /'，index，name ='index'），這兩個url文件。我認爲這造成了問題 – Ananthu

@Ananthu thx，我刪除了每個url（r'^ $ /'，index，name ='index'），但是它們都發生錯誤。我該如何解決這個問題？ – user8504021

嘗試修復正則表達式的URL到這個：'url（r'^ $'，index，name ='index'），'不帶'/' – neverwalkaloner

您有重複的網址及網址名稱index的複製，嘗試修復它

例如在民意調查.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的貫穿每個URL模式，從而，在所請求的URL匹配的第一個停止。」）

來源

2017-08-25 12:32:14

thx，我該如何解決？我應該添加＃^^^^？ – user8504021

@ user8504021我編輯答案，例如，但你需要檢查邏輯 –

thx，我固定爲你寫的，但TemplateDoesNotExist在/ polls/ 模板/ polls/index.html錯誤發生。我寫的url（r'^ $ '，TemplateView.as_view（template_name ='templates/polls/index.html'），name ='app_index'），。我更新了目錄，所以如果你知道什麼，請告訴我。 – user8504021

在您urls.py文件有不同的意見相同的網址。 Django只會考慮第一個url。刪除

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

從父就能解決問題

來源

2017-08-25 12:35:55 Ananthu

thx，我刪除了父母的索引url，但NoReverseMatch在/民意調查/ 找不到'索引'的反向。 'index'不是有效的視圖函數或模式名稱。錯誤發生。我該如何解決這個問題？ – user8504021

對不起，你應該使用url（r'^ $ /'，views.index，name ='index'）， – Ananthu

更新問題與views.py – Ananthu

好了，你沒有重複的URL，因爲你用的應用程序工作，所以這個問題是在這裏url(r'^$/',這是錯誤的正確方法是url(r'^$'的原因是你總是必須在URL的末尾設置$，試試這個，並告訴我

來源

2017-08-25 12:52:16

它沒有工作... – user8504021

那麼可能你沒有索引視圖或導入是錯誤的 –

NoReverseMatch at/polls/

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