user8504021
Reputation: 283
NoReverseMatch at /polls/
I am making a web sit by seeing Django tutorial. I got an error:
NoReverseMatch at /polls/ Reverse for 'index' with no arguments not found. 1 pattern(s) tried: ['$/'].
Traceback said
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: ['$/']
I wrote in base.html which is in as same as parent's app is like
{% 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>
urls.py of parents' directory is
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'^$/',index,name='index'),
]
urls.py of child app whose name is polls is like
from django.conf.urls import url
from django.views.generic import TemplateView
from . import views
app_name="polls"
urlpatterns = [
url(r'^$',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),
]
I really cannot understand why this error happens.Is the way of designating "{% url 'index' %}" wrong? how can I fix this?
My views.py is like
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()
My directory is directory
Upvotes: 2
Views: 1088
Answers (3)
user8060120
Reputation:
you have duplicate urls, and duplicate of url name index, try to fix it
for example in polls.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),
]
in urls.py
urlpatterns = [
url(r'^$',index,name='index'),
url(r'^admin/', admin.site.urls),
url(r'^polls/',include('polls.urls')),
]
urls ("Django runs through each URL pattern, in order, and stops at the first one that matches the requested URL.")
Upvotes: 0
Mauricio Cortazar
Reputation: 4213
Well, you don't have duplicate urls because you're working with apps, so the problem is here url(r'^$/', that's wrong the correct way is url(r'^$' the reason is you always must set the $ at the end of the URL, try that and tell me
Upvotes: 0
Self
Reputation: 537
On your urls.py files there are same urls for different views. Django will only consider the first url. Remove
url(r'^$/',index,name='index'),
from parent will solve the problem
Upvotes: 1
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