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- from django.shortcuts import get_object_or_404, render
- from django.http import HttpResponseRedirect, HttpResponse
- from django.core.urlresolvers import reverse
- from polls.models import Choice, Poll
- from django.views import generic
- from django.utils import timezone
- def index(request):
- latest_poll_list = Poll.objects.all().order_by('-pub_date')[:5]
- context = {'latest_poll_list': latest_poll_list}
- return render(request, 'polls/index.html', context)
- def detail(request, poll_id):
- poll = get_object_or_404(Poll, pk=poll_id)
- return render(request, 'polls/detail.html', {'poll': poll})
- def results(request, poll_id):
- poll = get_object_or_404(Poll, pk=poll_id)
- return render(request, 'polls/results.html', {'poll': poll})
- class IndexView(generic.ListView):
- template_name = 'polls/index.html'
- context_object_name = 'latest_poll_list'
- def get_queryset(self):
- """
- Return the last five published polls (not including those set to be
- published in the future).
- """
- return Poll.objects.filter(
- pub_date__lte=timezone.now()
- ).order_by('-pub_date')[:5]
- class DetailView(generic.DetailView):
- model = Poll
- template_name = 'polls/detail.html'
- def get_queryset(self):
- """
- Excludes any polls that aren't published yet.
- """
- return Poll.objects.filter(pub_date__lte=timezone.now())
- class ResultsView(generic.DetailView):
- model = Poll
- template_name = 'polls/results.html'
- 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,)))
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