Question

我制作了一个简单的博客和django民意调查教程。我试图让他们一起工作。当我加载一个帖子，与之关联的民意调查加载时，投票再次起作用，但当我点击一个选项然后点击投票按钮时，它会加载一个带有民意调查ID的帖子。我不确定它是我的“投票”功能在视图，我的“投票”网址，还是我的模板搞砸了？这是我的代码：

models.py：

# Post class
class Post(models.Model):
    title = models.CharField(max_length=60)
    description = models.CharField(max_length=200)
    body = models.TextField()
    created = models.DateTimeField(auto_now_add=True)

    def display_mySafeField(self):
        return mark_safe(self.body)

    def __unicode__(self):
        return self.title

# Poll for the Post
class Poll(models.Model):
    question = models.CharField(max_length=200)
    total_votes = models.IntegerField(default=0)
    post = models.ForeignKey(Post)
    voted = models.BooleanField(default=False)

    def __unicode__(self):
        return self.question


# Choice for the poll
class Choice(models.Model):
    poll = models.ForeignKey(Poll)
    choice = models.CharField(max_length=200)
    votes = models.IntegerField(default=0)
    percentage = models.DecimalField(default=0.0, max_digits=5, decimal_places=2)

    def __unicode__(self):
        return self.choice

urls.py：

urlpatterns = patterns('',
    ### main/index page
    url(r'^$', 'blog.views.main', name='index'),

    ### url for the post.html
    url(r'^post/(\d+)', 'blog.views.post'),

    ### polls
    url(r'^polls/(\d+)/results/$', 'blog.views.results'),
    url(r'^polls/(\d+)/vote/$', 'blog.views.vote'),
    url(r'^revote/(\d+)/$', 'blog.views.vote_again'),

)

views.py：

# main view for the posts
def main(request):
    posts = Post.objects.all().order_by("-created")
    paginator = Paginator(posts, 5)

    try: page = int(request.GET.get("page", '1'))
    except ValueError: page = 1

    try:
        posts = paginator.page(page)
    except (InvalidPage, EmptyPage):
        posts = paginator.page(paginator.num_pages)
    d = dict(posts=posts, user=request.user,
             post_list=posts.object_list, months=mkmonth_lst())

    return render_to_response("list.html", d)

def post(request, pk):
    post = Post.objects.get(pk=int(pk))
    comments = Comment.objects.filter(post=post)
    try:
        poll = Poll.objects.get(post=post)
    except Poll.DoesNotExist:
        poll = None
    d = dict(post=post, comments=comments, form=CommentForm(), user=request.user,
             months=mkmonth_lst(), poll=poll)
    d.update(csrf(request))
    return render_to_response("post.html", d)


#view to vote on the poll
def vote(request, post_id):
    global choice
    p = get_object_or_404(Poll, pk=post_id)
    try:
        selected_choice = p.choice_set.get(pk=request.POST['choice'])

    except (KeyError, Choice.DoesNotExist):
        # Redisplay the poll voting form.
        return render_to_response('post.html', {
            'poll': p,
            'error_message': "You didn't select a choice.",
            }, context_instance=RequestContext(request))
    else:
        selected_choice.votes += 1
        p.total_votes += 1
        selected_choice.save()
        p.voted = True
        p.save()

        choices = list(p.choice_set.all())
        for choice in choices:
            percent = choice.votes*100/p.total_votes
            choice.percentage = percent
            choice.save()

        return HttpResponseRedirect(reverse("blog.views.post", args=[post_id    ]))

def vote_again(request, post_pk):
    try:
        p = get_object_or_404(Poll, post_id=post_pk)
    except (KeyError, Poll.DoesNotExist):
        pass
    else:
        p.voted = False
        p.save()
    return HttpResponseRedirect(reverse("blog.views.post", args=[post_pk]))

这就是发生的事情：

post1 - linked to - poll1
post2 - not linked
post3 - linked to - poll2

当我对与post3相关联的poll2进行投票时，它会更新poll2的数据库，但它会重新加载post2而不是post3。

Answer 1

在您的HTML表单中，您的操作设置为/polls/{{ poll.id }}/vote/。但是，它正在寻找post.pk值，而不是poll.pk。它在提交数据后使用该值重新加载页面。那应该是你的问题。

修改

def vote(request, poll_id): global choice 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_to_response('post.html', { 'poll': p, 'error_message': "You didn't select a choice.", }, context_instance=RequestContext(request)) else: selected_choice.votes += 1 p.total_votes += 1 selected_choice.save() p.voted = True p.save() choices = list(p.choice_set.all()) for choice in choices: percent = choice.votes*100/p.total_votes choice.percentage = percent choice.save() return HttpResponseRedirect(reverse("blog.views.post", args=[ p.post.pk ] )

将django民意调查教程应用添加到另一个应用程序

1 个答案: