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python - NoReverseMatch 位于/polls/

转载 作者：太空宇宙 更新时间：2023-11-03 14:51:23 28 4
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我正在通过查看 Django 教程来制作网站。我收到一个错误:

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

error

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: ['$/']

我在base.html中写的，它与父应用程序相同

{% 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>

parent 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'),
]

名称为 polls 的子应用程序的 urls.py 类似于

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),
]

我实在不明白为什么会出现这个错误。难道"{% url 'index' %}"的指定方式有问题吗？我该如何解决这个问题？

我的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

最佳答案

在您的 urls.py 文件中，不同 View 有相同的网址。 Django 只会考虑第一个 url。删除

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

家长的帮助就能解决问题

关于python - NoReverseMatch 位于/polls/，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/45881350/

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