20121023 django学习笔记3

设计url

mysite/urls.py

 1 from django.conf.urls import *

 2 

 3 # Uncomment the next two lines to enable the admin:

 4 from django.contrib import admin

 5 admin.autodiscover()

 6 

 7 urlpatterns = patterns('',

 8     url(r'^polls/', include('polls.urls')),

 9     url(r'^admin/', include(admin.site.urls)),

10 )

polls/urls.py

1 from django.conf.urls import *

2 

3 urlpatterns = patterns('polls.views',

4     url(r'^$', 'index',),

5     url(r'^(?P<poll_id>\d+)/$', 'detail',),

6     url(r'^(?P<poll_id>\d+)/results/$', 'results',),

7     url(r'^(?P<poll_id>\d+)/vote/$', 'vote',),

8 )

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

 1 from django.template import Context, loader

 2 from polls.models import Poll

 3 from django.http import HttpResponse

 4 from django.shortcuts import render_to_response, get_object_or_404

 5 from django.http import Http404

 6 

 7 def index(request):

 8     latest_poll_list = Poll.objects.all().order_by('-pub_date')[:5]

 9     return render_to_response('polls/index.html', {'latest_poll_list': latest_poll_list})

10 

11 def detail(request, poll_id):

12     p = get_object_or_404(Poll, pk=poll_id)

13     return render_to_response('polls/detail.html', {'poll': p})

14 

15 def results(request, poll_id):

16     return HttpResponse("You're looking at the results of poll %s." % poll_id)

17 

18 def vote(results, poll_id):

19     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

1 {% if latest_poll_list %}

2     <ul>

3     {% for poll in latest_poll_list %}

4         <li><a href="/polls/{{poll.id}}/">{{poll.question}}</a></li>

5     {% endfor %}

6     </ul>

7 {% else %}

8     <p>No polls are available.</p>

9 {% endif %}