20121023 django学习笔记3

设计url

mysite/urls.py

from django.conf.urls import *

# Uncomment the next two lines to enable the admin:
from django.contrib import admin
admin.autodiscover()

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

polls/urls.py

from django.conf.urls import *

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

通过正则表达式匹配对应的url以调用相应的视图

视图polls/views.py

from django.template import Context, loader
from polls.models import Poll
from django.http import HttpResponse
from django.shortcuts import render_to_response, get_object_or_404
from django.http import Http404

def index(request):
    latest_poll_list = Poll.objects.all().order_by('-pub_date')[:5]
    return render_to_response('polls/index.html', {'latest_poll_list': latest_poll_list})

def detail(request, poll_id):
    p = get_object_or_404(Poll, pk=poll_id)
    return render_to_response('polls/detail.html', {'poll': p})

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

def vote(results, poll_id):
    return HttpResponse("You're voting on poll %s." % poll_id)

视图函数中polls/index.html为模板

模板路径的定义在settings.py中TMPLATE_DIRS

 

模板polls/index.html

{% if latest_poll_list %}
    <ul>
    {% for poll in latest_poll_list %}
        <li><a href="/polls/{{poll.id}}/">{{poll.question}}</a></li>
    {% endfor %}
    </ul>
{% else %}
    <p>No polls are available.</p>
{% endif %}