NoReverseMatch - Django 1.7初学者教程

问题描述

我正在遵循Django 1.7.1中的begginers教程，并且收到此错误

 反向投票与参数'（5，）'和关键字参数'{}'未找到。 0模式尝试：[]`poll\templates\poll\detail.html，错误在第12行
  

经过一番研究，我发现人们提出类似的问题，有人建议他们从普通网址中删除现金 $ ，因为urlloader只是占用空字符串，而这并没有给我错误无反向匹配，它混淆了所有其他的东西，每当我尝试到达任何其他url它重定向到主要的url，而不删除现金 $ 我可以完美地继续这些网址。那么我做错了什么？

这里是项目URLS：

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

应用程序URLS：

  from django.conf.urls import patterns，url 
 
 from poll import views 
 
 urlpatterns = patterns（''，
 #eg / poll / 
 url（r'^ $'，views.IndexView.as_view（），name ='index'）， 
 #eg / poll / 5 / 
 url（r'^（？P< pk> \d +）/ $'，views.DetailView.as_view（），name ='detail'），
 #eg / poll / 5 / results / 
 url（r'^（？P< pk> \d +）/ results / $'，views.ResultsView.as_view（），name ='results' ），
 #eg / poll / 5 / votes / 
 url（r'^（？P< question_id> \d +）/ votes / $'，views.votes，name ='votes' ，
）
  

视图：从django.shortcuts导入render，get_object_or_404
从django.http导入HttpResponseRedirect
from django.core

 .urlresolvers import reverse 
 from django.views import generic 
 from poll.models import Question，Choice 
 
 
 class IndexView（generic.ListView）：
 template_name ='poll / index.html'
 context_object_name ='latest_question_list'
 
 def get_queryset（self）：
返回最后五个发布的问题。
 return Question.objects.order_by（' -  pup_date'）[：5] 
 
 
 class DetailView（generic.DetailView）：
 model = Question 
 template_name ='poll / detail.html'
 
 
 class ResultsView（generic.DetailView）：
 model = Question 
 template_name ='poll / results.html'
 
 
 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）：
＃重新显示问题投票表单。 
 return render（request，'poll / detail.html'，{
'question'：p，
'error_message'：你没有选择一个选择，
}）
 else：
 selected_choice.votes + = 1 
 selected_choice.save（）
＃成功处理
＃与POST数据之后，始终返回一个HttpResponseRedirect。如果
＃用户点击后退按钮，则可以防止数据发布两次。 
 return HttpResponseRedirect（reverse（'poll：results'，args =（p.id，）））
  

此外，我猜这可能与动作 {％URL％} 和方法 post 正在传递，所以这里是错误< form action ={％url'poll：vote'question.id％}中指定的模板文件的代码行method =post < / code>

如果您需要其他任何信息，请告诉我们，并提前感谢

解决方案

urls.py 中的URL名称为投票，而您正在搜索 poll：vote ，修复它：

 < form action ={％url'poll：votes'question.id％}method =post> 
 HERE ^ 
  

I am following the begginers tutorial in Django 1.7.1 and am getting this error

Reverse for 'vote' with arguments '(5,)' and keyword arguments '{}' not found. 0 pattern(s) tried: [] `poll\templates\poll\detail.html, error at line 12`

after a bit of research I found people asking similar question and someone suggested that they should remove the cash $ from the general url, because the urlloader just takes the empty string, while this doesn't gives me the error No Reverse Match, it messes everything else up, whenever I try to reach any other url it redirects me to the main url, while without removing the cash $ I can perfectly proceed to these urls. So what is it that I am doing wrong?

Here is the project URLS:

urlpatterns = patterns('',
    url(r'^poll/', include('poll.urls', namespace="poll")),
    url(r'^admin/', include(admin.site.urls)),
)

And the app URLS:

from django.conf.urls import patterns, url

from poll import views

urlpatterns = patterns('',
    #e.g. /poll/
    url(r'^$', views.IndexView.as_view(), name='index'),
    #e.g. /poll/5/
    url(r'^(?P<pk>\d+)/$', views.DetailView.as_view(), name='detail'),
    #e.g. /poll/5/results/
    url(r'^(?P<pk>\d+)/results/$', views.ResultsView.as_view(), name='results'),
    #e.g. /poll/5/votes/
    url(r'^(?P<question_id>\d+)/votes/$', views.votes, name='votes'),
)

And the views:

from django.shortcuts import render, get_object_or_404
from django.http import HttpResponseRedirect
from django.core.urlresolvers import reverse
from django.views import generic
from poll.models import Question, Choice


class IndexView(generic.ListView):
    template_name = 'poll/index.html'
    context_object_name = 'latest_question_list'

    def get_queryset(self):
        """Return the last five published questions."""
        return Question.objects.order_by('-pup_date')[:5]


class DetailView(generic.DetailView):
    model = Question
    template_name = 'poll/detail.html'


class ResultsView(generic.DetailView):
    model = Question
    template_name = 'poll/results.html'


def votes(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, 'poll/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('poll:results', args=(p.id,)))

Also I guess it might be sth related to how the action {%URL%} and the method post are being passed, so here is the code line from the template file specified in the error <form action="{% url 'poll:vote' question.id %}" method="post">

Please let me know if you need anything else, and thanks in advance

解决方案

The URL name in urls.py is votes and you are searching for poll:vote, fix it:

<form action="{% url 'poll:votes' question.id %}" method="post">
                          HERE ^

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