Django(四)

<li><a href="{% url 'detail' poll.id %}">{{ poll.question }}</a></li>

from django.conf.urls import patterns, include, url

from django.contrib import admin
admin.autodiscover()

urlpatterns = patterns('',
    url(r'^polls/', include('polls.urls', namespace="polls")),
    url(r'^admin/', include(admin.site.urls)),
)
<li><a href="{% url 'polls:detail' poll.id %}">{{ poll.question }}</a></li>
命名空间 多个应用防止冲突
view.py
# Create your views here.
from django.http import HttpResponseRedirect, HttpResponse
from django.core.urlresolvers import reverse
from polls.models import Poll
from django.template import Context, loader
from django.shortcuts import get_object_or_404,render
from django.http import Http404

def index(request):
        latest_poll_list = Poll.objects.order_by('-pub_date')[:5]
        template = loader.get_template('polls/index.html')
        context = Context({
                'latest_poll_list': latest_poll_list,
        })
        return HttpResponse(template.render(context))

def detail(request, poll_id):
        try:
                poll = Poll.objects.get(pk=poll_id)
        except Poll.DoesNotExist:
                raise Http404

        return render(request, 'polls/detail.html', {'poll':poll})

def results(request, poll_id):
        return HttpResponse("You're looking at the results of poll %s." % poll_id)

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 the poll voting form.
                return render(request, 'polls/detail.html', {
                        'poll': 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,)))

detail.html

<h1>{{ poll.question }}</h1>


{% if error_message %}<p><strong>{{ error_message }}</strong></p>{% endif %}


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