NoReverseMatch Exception help in Django
Solution 1
Try using:
return HttpResponseRedirect(reverse('poll_results', kwargs={'object_id': p.id}))
Solution 2
Are you sure that's where your error really is? Based on the error message, it sounds like either in a view or in a template you are trying to reverse 'polls/poll_results'
(in a template, you may be doing something like {% url polls/poll_results poll.pk %}
)
Solution 3
I could not find any explanation that fixed the problem, until I ran across this person's abridged Django tutorial: http://tony.abou-assaleh.net/web-development/stripped-down-django-tutorial
It's basically a line in the details template, which should be:
<form action="/polls/{{ poll.id }}/vote/" method="post">
Instead of:
<form action="{% url 'polls.views.vote' poll.id %}" method="post">
I'm not sure why this fixed the issue, but it did for me. I'd love an explanation if anyone has one.
mportiz08
Updated on July 20, 2022Comments
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mportiz08 almost 2 years
I'm fairly new to python and following along with part 4 of the tutorial for the Django framework here. I'm trying to implement generic views for the polls app--my code seems correct (as far as I can tell), but when I try to vote, I get a NoReverseMatch Exception that states:
Reverse for 'polls/poll_results' with arguments '(1L,)' and keyword arguments '{}' not found.
My code was working perfectly before I attempted the generic views, but I can't seem pinpoint the problem now.
Here's the code for my urls.py in the poll directory:
from django.conf.urls.defaults import * from djtest.polls.models import Poll info_dict = { 'queryset': Poll.objects.all(), } urlpatterns = patterns('', (r'^$', 'django.views.generic.list_detail.object_list', info_dict), (r'^(?P<object_id>\d+)/$', 'django.views.generic.list_detail.object_detail', info_dict), url(r'^(?P<object_id>\d+)/results/$', 'django.views.generic.list_detail.object_detail', dict(info_dict, template_name='polls/results.html'), 'poll_results'), (r'^(?P<poll_id>\d+)/vote/$', 'djtest.polls.views.vote'), )
And here is the views.py:
from django.http import HttpResponse, Http404, HttpResponseRedirect from django.shortcuts import render_to_response, get_object_or_404 from django.core.urlresolvers import reverse from djtest.polls.models import Poll, Choice def vote(request, poll_id): p = get_object_or_404(Poll, pk=poll_id) try: selected_choice = p.choice_set.get(pk=request.POST['choice']) except (KeyError, Choice.DoesNotExist): #redisplay form return render_to_response('polls/poll_detail.html', { 'object': p, 'error_message': "You didn't select a choice.", }) else: selected_choice.votes += 1 selected_choice.save() return HttpResponseRedirect(reverse('poll_results', args=(p.id,)))
I have a feeling that it is a syntactical error, but I can't find it. Thanks in advance for any help...