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annotate polls/views.py @ 1089:64fb0d6933a4

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author Brian Neal <bgneal@gmail.com>
date Sun, 08 May 2016 21:03:09 -0500
parents ee87ea74d46b
children 71685387dd11
rev   line source
bgneal@439 1 """
bgneal@439 2 Views for the polls application.
gremmie@1 3
bgneal@439 4 """
bgneal@447 5 import datetime
bgneal@447 6
bgneal@439 7 from django.shortcuts import render
gremmie@1 8 from django.contrib.auth.decorators import login_required
gremmie@1 9 from django.shortcuts import get_object_or_404
gremmie@1 10 from django.http import Http404
gremmie@1 11 from django.http import HttpResponseRedirect
gremmie@1 12 from django.core.urlresolvers import reverse
bgneal@439 13 from django.views.decorators.http import require_POST
bgneal@439 14 from django.db.models import F
gremmie@1 15
gremmie@1 16 from polls.models import Poll
gremmie@1 17 from polls.models import Choice
gremmie@1 18 from polls.forms import VoteForm
gremmie@1 19
gremmie@1 20 #######################################################################
gremmie@1 21
bgneal@439 22 def get_user_choice(user, poll):
bgneal@439 23 """
bgneal@447 24 Return the Choice object the given user voted for from the given poll,
bgneal@447 25 or None if no vote has been recorded (or the user is not authenticated.
bgneal@439 26
bgneal@439 27 """
bgneal@439 28 user_choice = None
bgneal@439 29 if user.is_authenticated():
bgneal@439 30 user_choices = user.choice_set.filter(poll=poll)
bgneal@439 31 if user_choices:
bgneal@439 32 user_choice = user_choices[0]
bgneal@439 33
bgneal@439 34 return user_choice
bgneal@439 35
bgneal@439 36 #######################################################################
bgneal@439 37
gremmie@1 38 def poll_index(request):
bgneal@439 39 current_polls = Poll.objects.get_current_polls()
bgneal@439 40 old_polls = Poll.objects.get_old_polls()
bgneal@439 41 return render(request, 'polls/index.html', {
bgneal@439 42 'current_polls': current_polls,
bgneal@439 43 'old_polls': old_polls,
bgneal@439 44 })
gremmie@1 45
gremmie@1 46 #######################################################################
gremmie@1 47
gremmie@1 48 def poll_detail(request, poll_id):
bgneal@439 49 poll = get_object_or_404(Poll, pk=poll_id)
bgneal@447 50 if not poll.is_enabled or poll.start_date > datetime.datetime.now():
bgneal@439 51 raise Http404
gremmie@1 52
bgneal@447 53 total_votes, choices = poll.results()
bgneal@447 54
bgneal@447 55 return render(request, 'polls/poll_detail.html', {
bgneal@439 56 'poll': poll,
bgneal@447 57 'total_votes': total_votes,
bgneal@447 58 'choices': choices,
bgneal@439 59 'user_choice': get_user_choice(request.user, poll),
bgneal@439 60 })
gremmie@1 61
gremmie@1 62 #######################################################################
gremmie@1 63
gremmie@1 64 @login_required
gremmie@1 65 def poll_vote(request, poll_id):
bgneal@439 66 poll = get_object_or_404(Poll, pk=poll_id)
bgneal@439 67 if not poll.is_enabled:
bgneal@439 68 raise Http404
bgneal@439 69 if not poll.is_open():
bgneal@447 70 return HttpResponseRedirect(reverse('polls-detail',
bgneal@447 71 kwargs={'poll_id': poll_id}))
gremmie@1 72
bgneal@439 73 user_choice = get_user_choice(request.user, poll)
gremmie@1 74
bgneal@439 75 if request.method == "POST":
bgneal@447 76 vote_form = VoteForm(poll, request.POST, user=request.user,
bgneal@447 77 user_choice=user_choice)
bgneal@439 78 if vote_form.is_valid():
bgneal@439 79 vote_form.save()
bgneal@447 80 return HttpResponseRedirect(reverse('polls-detail',
bgneal@447 81 kwargs={'poll_id': poll_id}))
bgneal@439 82 else:
bgneal@439 83 vote_form = VoteForm(poll)
bgneal@439 84
bgneal@439 85 return render(request, 'polls/poll_vote.html', {
bgneal@439 86 'poll': poll,
bgneal@439 87 'vote_form': vote_form,
bgneal@439 88 'user_choice': user_choice,
bgneal@439 89 })
gremmie@1 90
gremmie@1 91 #######################################################################
gremmie@1 92
bgneal@439 93 @require_POST
bgneal@439 94 @login_required
bgneal@439 95 def poll_delete_vote(request):
bgneal@439 96 poll = get_object_or_404(Poll, pk=request.POST.get('poll_id'))
bgneal@439 97 user_choice = get_user_choice(request.user, poll)
bgneal@439 98 if user_choice:
bgneal@439 99 Choice.objects.filter(id=user_choice.id).update(votes=F('votes') - 1)
bgneal@439 100 user_choice.voters.remove(request.user)
bgneal@439 101
bgneal@447 102 return HttpResponseRedirect(reverse('polls-detail', kwargs={'poll_id': poll.id}))