Python 额外的；“行级”；ListView django中的数据

我正在编写我的第一个django应用程序，似乎无法通过ListView将“行级”数据传递给模板。具体地说，我试图使用PollListView显示所有民意调查及其相应的投票信息

目前我只能通过模板的所有投票，但只想通过属于特定投票的投票

型号.py

class Poll(models.Model):
    user = models.ForeignKey(User, unique=False, blank=False, db_index=True)
    title = models.CharField(max_length=80)

class Vote(models.Model):
    poll = models.ForeignKey(Poll, unique=False, blank=False, db_index=True)
    user = models.ForeignKey(User, unique=False, blank=True, null=True, db_index=True)
    vote = models.CharField(max_length=30, blank=False, default='unset', choices=choices)

class PollListView(ListView):
    model = Poll
    template_name = 'homepage.html'
    context_object_name="poll_list"

    def get_context_data(self, **kwargs):
        context = super(PollListView, self).get_context_data(**kwargs)
        context['vote_list'] = Vote.objects.all()
        return context

urlpatterns = patterns('',
...
    url(r'^$', PollListView.as_view(), name="poll-list"),
}

class PollListView(ListView):
    queryset = Poll.objects.all().prefetch_related('votes')

视图.py

class Poll(models.Model):
    user = models.ForeignKey(User, unique=False, blank=False, db_index=True)
    title = models.CharField(max_length=80)

class Vote(models.Model):
    poll = models.ForeignKey(Poll, unique=False, blank=False, db_index=True)
    user = models.ForeignKey(User, unique=False, blank=True, null=True, db_index=True)
    vote = models.CharField(max_length=30, blank=False, default='unset', choices=choices)

class PollListView(ListView):
    model = Poll
    template_name = 'homepage.html'
    context_object_name="poll_list"

    def get_context_data(self, **kwargs):
        context = super(PollListView, self).get_context_data(**kwargs)
        context['vote_list'] = Vote.objects.all()
        return context

urlpatterns = patterns('',
...
    url(r'^$', PollListView.as_view(), name="poll-list"),
}

class PollListView(ListView):
    queryset = Poll.objects.all().prefetch_related('votes')

url.py

class Poll(models.Model):
    user = models.ForeignKey(User, unique=False, blank=False, db_index=True)
    title = models.CharField(max_length=80)

class Vote(models.Model):
    poll = models.ForeignKey(Poll, unique=False, blank=False, db_index=True)
    user = models.ForeignKey(User, unique=False, blank=True, null=True, db_index=True)
    vote = models.CharField(max_length=30, blank=False, default='unset', choices=choices)

class PollListView(ListView):
    model = Poll
    template_name = 'homepage.html'
    context_object_name="poll_list"

    def get_context_data(self, **kwargs):
        context = super(PollListView, self).get_context_data(**kwargs)
        context['vote_list'] = Vote.objects.all()
        return context

urlpatterns = patterns('',
...
    url(r'^$', PollListView.as_view(), name="poll-list"),
}

class PollListView(ListView):
    queryset = Poll.objects.all().prefetch_related('votes')

homepage.html

{% for poll in poll_list %}
  {{ poll.title }}
  {% for vote in vote_list %} 
     {{ vote.id }} {{ vote.vote }} 
  {% endfor %}
{% endfor %}

这似乎是一项简单的任务，但我似乎不知道如何使用基于类的视图来实现这一点。我应该使用mixin还是额外的上下文？覆盖查询集？或者我应该使用基于函数的视图来解决这个问题

---

任何帮助都将不胜感激。

我不确定它是否有效，但您可以尝试以下方法：

models.py（投票类）

视图.py

class Poll(models.Model):
    user = models.ForeignKey(User, unique=False, blank=False, db_index=True)
    title = models.CharField(max_length=80)

class Vote(models.Model):
    poll = models.ForeignKey(Poll, unique=False, blank=False, db_index=True)
    user = models.ForeignKey(User, unique=False, blank=True, null=True, db_index=True)
    vote = models.CharField(max_length=30, blank=False, default='unset', choices=choices)

class PollListView(ListView):
    model = Poll
    template_name = 'homepage.html'
    context_object_name="poll_list"

    def get_context_data(self, **kwargs):
        context = super(PollListView, self).get_context_data(**kwargs)
        context['vote_list'] = Vote.objects.all()
        return context

urlpatterns = patterns('',
...
    url(r'^$', PollListView.as_view(), name="poll-list"),
}

class PollListView(ListView):
    queryset = Poll.objects.all().prefetch_related('votes')

使用该选项，您可以访问相关投票：

模板

{% for poll in poll_list %}
  {{ poll.title }}
  {% for vote in poll.votes.all %} 
     {{ vote.id }} {{ vote.vote }} 
  {% endfor %}
{% endfor %}

---

你要的是所有的选票。我想您应该使用

Vote.objects.filter（poll=instance）

。@RobL我没有得到错误，而是得到了每个投票返回的所有投票。因此，如果每次投票都有1票，而我有3票，那么我得到的是PollA-3票，PollB-3票，PollC-3票。@RobL感谢您的反馈。我尝试了你的建议（Vote.objects.filter（poll=instance）使用self.instance但出现以下错误：“PollListView”对象没有属性“instance”是的，很抱歉。@mariodev在下面有它。谢谢你的回答。我将查询集添加到ListView中。没有错误，但变量在模板中不可用。我是否需要添加多个字段来轮询才能工作？@Darth否，它使用s反向关系。是否从视图中删除了

model

属性？我删除了model属性，但运气不佳。是否需要定义“投票集”某处？我应该覆盖get_queryset方法还是在类定义中设置属性就足够了？@Darth我已经更新了我的帖子，请在更改后再试一次。如果不起作用，我会自己尝试。。