Django 1.7.4:Django 1.7 tutorial04上的错误04:“投票"的Reverse的NoReverseMatch错误

Django 1.7.4:Django 1.7 tutorial04上的错误04:“投票

问题描述：

我整个上午一直在努力地完成Django 1.7 tutorial04的工作.我已经阅读了关于OverReflowMatch错误的所有关于*的类似文章，我的错误略有不同:

I have been banging my head against the wall all morning trying to complete the Django 1.7 tutorial04. I have read through all the similar posts on * regarding the NoReverseMatch error, my error is slightly different:

未找到带有参数'(''，)'和关键字参数'{}'的'vote'反向字符.尝试了1种模式:[u'polls/(?P< question_id> \\ d +)/vote/$'] .

看来我的details.html表单动作属性令人king目结舌:

It appears it is choking on my details.html form action attribute:

<body bgcolor="white">
    <h1>{{ question.question_text }}</h1>
    {% if error_message %}<p><strong>{{ error_message }}</strong></p>{% endif %}

    <form action="{% url 'polls:vote' question_id %}" method="post">
    {% csrf_token %}
    {% for choice in question.choice_set.all %}
        <input type="radio" name="choice" id="choice{{ forloop.counter }}" value="{{ choice.id }}" />
        <label for="choice{{ forloop.counter }}">{{ choice.choice_text }}</label><br />
    {% endfor %}
        <input type="submit" value="Vote" />
    </form>
</body>

我已经在主URL中定义了民意调查名称空间，并使其在我的民意调查索引页面上工作-ul li中的标记正在使用 {％url'polls:detail'question.id％} ，效果很好.

I have already defined the polls namespace in my main urls and got it working on my polls index page - the a tag inside the ul li is using {% url 'polls:detail' question.id %} and it works just fine.

我的民意调查/urls.py看起来像:

My polls/urls.py looks like:

from django.conf.urls import patterns, url

from polls import views

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

最后，我的民意调查/views.py:

Finally my polls/views.py:

from django.shortcuts import render, get_object_or_404
from django.http import HttpResponse,Http404
from django.http import HttpResponseRedirect, HttpResponse

from polls.models import Question,Choice

# Create your views here.

def index(request):
    latest_question_list = Question.objects.order_by('-pub_date')[:5]
    context = {'latest_question_list': latest_question_list}
    return render(request, 'polls/index.html', context)

def detail(request, question_id):
    question = get_object_or_404(Question, pk=question_id)
    return render(request, 'polls/detail.html', {'question':question})

def results(request, question_id):
    response = HttpResponse("You're looking at the results of question %s.")
    return HttpResponse(response % question_id)

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
        select_choice.save()
        # always return response redirect after dealing with POST 
        # to prevent reposts if user hits back button
        return HttpResponseRedirect(reverse('polls:results', args=(p.id,)))

错误:

NoReverseMatch at /polls/1/

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

Request Method:     GET
Request URL:    http://localhost:8000/polls/1/
Django Version:     1.7.4
Exception Type:     NoReverseMatch
Exception Value:    

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

Exception Location:     /usr/local/lib/python2.7/site-packages/django/core/urlresolvers.py in _reverse_with_prefix, line 468
Python Executable:  /usr/bin/python
Python Version:     2.7.9

任何帮助将不胜感激.谢谢您的阅读.

Any assistance would be greatly appreciated. Thank you for reading.

答

而不是 question_id ，请尝试在模板中使用 question.id ，即:

Instead of question_id, try using question.id in the template, i.e.:

<form action="{% url 'polls:vote' question.id %}" method="post">

Django 1.7.4:Django 1.7 tutorial04上的错误04:“投票"的Reverse的NoReverseMatch错误

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