Hi,
I've finished the Django tutorial but I just can't seem to get my "votes"
function to work right. I would start the server, go to polls, and every
time I try to vote for something, the KeyError message comes up i.e. "You
didn't select a choice." when I did. Maybe if there was some way to define
these choices it might fix it, but I'm not sure.
Here's my*
views.py*:
from django.http import HttpResponseRedirect
from django.shortcuts import render, get_object_or_404
from django.core.urlresolvers import reverse
from django.views import generic
from django.utils import timezone
from polls.models import Poll, Choice
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)))
*models.py *:
from django.db import models
import datetime
from django.utils import timezone
class Poll(models.Model):
question = models.CharField(max_length=200)
pub_date = models.DateTimeField('date published')
def __unicode__(self):
return self.question
def was_published_recently(self):
now = timezone.now()
return now - datetime.timedelta(days=1) <= self.pub_date < now
# return self.pub_date >= timezone.now() -
datetime.timedelta(days=1)
was_published_recently.admin_order_field = 'pub_date'
was_published_recently.boolean = True
was_published_recently.short_description = 'Published recently?'
class Choice(models.Model):
poll = models.ForeignKey(Poll)
choice_text = models.CharField(max_length=200)
votes = models.IntegerField(default=0)
def __unicode__(self):
return self.choice_text
*/polls/urls.py *:
from django.conf.urls import patterns, url
from polls import views
urlpatterns = patterns('',
url(r'^$', views.IndexView.as_view(), name='index'),
url(r'^(?P<pk>\d+)/$', views.DetailView.as_view(), name='detail'),
url(r'^(?P<pk>\d+)/results/$', views.ResultsView.as_view(),
name='results'),
url(r'^(?P<poll_id>\d+)/vote/$', views.vote, name='vote'),
)
and *detail.html*
<h1>{{ poll.question }}</h1>
{% if error_message %}<p><strong>{{ error_message }}</strong></p>{% endif %}
<form action="{% url 'polls:vote' poll.id %}" method="post">
{% csrf_token %}
{% for choice in poll.choice_set.all %}
<input type="radio" name="choice{{ forloop.counter }}" value="{{
choice.id }}" />
<label for="choice{{ forloop.counter }}">{{ choice.choice_text
}}</label><br />
{% endfor %}
<input type="submit" value="Vote" />
</form>
Any ideas?
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