Re: Reverse for 'results' with arguments '(3L,)' and keyword arguments '{}' not found.

On Tuesday, December 2, 2014 6:39:46 AM UTC-8, Terry Lang wrote:

I am in the middle of tutorial 4, but am getting an error.
What did I do wrong?

NoReverseMatch at /polls/3/vote/

Reverse for 'results' with arguments '(3L,)' and keyword arguments '{}' not found. 1 pattern(s) tried: [u'polls/(lP<question_id>\\d+)/results/$']

Request Method:	POST
Request URL:	http://www.alzacloud.net:8000/polls/3/vote/
Django Version:	1.7.1
Exception Type:	NoReverseMatch
Exception Value:	Reverse for 'results' with arguments '(3L,)' and keyword arguments '{}' not found. 1 pattern(s) tried: [u'polls/(lP<question_id>\\d+)/results/$']
Exception Location:	/home/terryl/cloud/local/lib/python2.7/site-packages/django/core/urlresolvers.py in _reverse_with_prefix, line 468
Python Executable:	/home/terryl/cloud/bin/python
Python Version:	2.7.6
Python Path:	['/home/terryl/pjtcloud', '/home/terryl/cloud/lib/python2.7', '/home/terryl/cloud/lib/python2.7/plat-x86_64-linux-gnu', '/home/terryl/cloud/lib/python2.7/lib-tk', '/home/terryl/cloud/lib/python2.7/lib-old', '/home/terryl/cloud/lib/python2.7/lib-dynload', '/usr/lib/python2.7', '/usr/lib/python2.7/plat-x86_64-linux-gnu', '/usr/lib/python2.7/lib-tk', '/home/terryl/cloud/local/lib/python2.7/site-packages', '/home/terryl/cloud/lib/python2.7/site-packages']

polls/urls.py

from django.conf.urls import patterns, include, url
from django.contrib import admin
from polls import views

#urlpatterns = patterns('',
#    url(r'^polls/', include('polls.urls')),
#    url(r'^admin/', include(admin.site.urls)),
#)

    # ex: /polls/
    # ex: /polls/5/
    # ex: /polls/5/results/
    # ex: /polls/5/vote/
urlpatterns = patterns('',
    url(r'^$', views.index, name='index'),
    url(r'^(?P<question_id>\d+)/$', views.detail, name='detail'),
    url(r'^(lP<question_id>\d+)/results/$', views.results, name='results'),
    url(r'^(?P<question_id>\d+)/vote/$', views.vote, name='vote'),
)


polls/views.py

from django.shortcuts import get_object_or_404, render  from django.http import HttpResponseRedirect, HttpResponse  from django.core.urlresolvers import reverse    from polls.models import Choice, Question  # ...  def vote(request, question_id):      p = get_object_or_404(Question, pk=question_id)      try:          selected_choice = p.choice_set.get(pk=request.POST['choice'])      except (KeyError, Choice.DoesNotExist):          # Redisplay the question voting form.          return render(request, 'polls/detail.html', {              'question': p,              'error_message': "You didn't select a choice.",          })      else:          selected_choice.votes += 1          selected_choice.save()          # Always return an HttpResponseRedirect after successfully dealing          # with POST data. This prevents data from being posted twice if a          # user hits the Back button.          return HttpResponseRedirect(reverse('polls:results', args=(p.id,)))

Look at the regex for the results path match, you have a lowercase ell where there should be a question mark. 

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