20121023 django学习笔记4

在模板中创建表单

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

 2 

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

 4 

 5 <form action="/polls/{{ poll.id }}/vote/" method="post">

 6 {% csrf_token %}

 7 {% for choice in poll.choice_set.all %}

 8     <input type="radio" name="choice" id="choice{{ forloop.counter }}" value="{{ choice.id }}" />

 9     <label for="choice{{ forloop.counter }}">{{ choice.choice }}</label><br />

10 {% endfor %}

11 <input type="submit" value="Vote" />

12 </form>

对应表单的回调页面

 1 from django.template import RequestContext

 2 from polls.models import Poll, Choice

 3 from django.http import HttpResponse, HttpResponseRedirect

 4 from django.shortcuts import render_to_response, get_object_or_404

 5 from django.core.urlresolvers import reverse

 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}, context_instance=RequestContext(request))

14 

15 def results(request, poll_id):

16     p = get_object_or_404(Poll, pk=poll_id)

17     return render_to_response('polls/results.html', {'poll': p})

18 

19 def vote(request, poll_id):

20     p = get_object_or_404(Poll, pk=poll_id)

21     try:

22         selected_choice = p.choice_set.get(pk=request.POST['choice'])

23     except (KeyError, Choice.DoesNotExist):

24         return render_to_response('polls/detail.html', {

25             'poll': p,

26             'error_message': "You didn't select a choice.",

27         }, context_instance=RequestContext(request))

28     else:

29         selected_choice.votes += 1

30         selected_choice.save()

31         return HttpResponseRedirect(reverse('polls.views.results', args=(p.id,)))