您好我想问这个因为我是django中的新手,我的麻烦在于我想要计算有多少评论有帖子并将其放入html模板中。 但事实是,我正在使用收集数据库中的所有事件,但我只想显示每个事件的评论数量" for"正在显示。 这是我的模型,视图和模板。 非常感谢你。
模型
class Event(TimeStampModel):
name = models.CharField(max_length=200, unique=True)
slug = models.SlugField(editable=False)
summary = models.TextField(max_length=255)
content = models.TextField()
category = models.ForeignKey(Category)
place = models.CharField(max_length=50)
start = models.DateTimeField()
finish = models.DateTimeField()
image = models.ImageField(upload_to = 'eventos')
is_free = models.BooleanField(default=True)
amount = models.DecimalField(max_digits=6, decimal_places=0, default=0)
views = models.PositiveIntegerField(default=0)
organizer = models.ForeignKey(settings.AUTH_USER_MODEL, blank=True, null=True)
def save(self, *args, **kwargs):
if not self.id:
self.slug = slugify(self.name)
super(Event, self).save(*args, **kwargs)
def __unicode__(self):
return self.name
class Comments(TimeStampModel):
user = models.ForeignKey(settings.AUTH_USER_MODEL)
event = models.ForeignKey(Event)
content = models.TextField()
def __unicode__(self):
return "%s %s" % (self.user.username, self.event.name)
查看
class IndexView(TemplateView):
template_name = 'eventos/index.html'
def get_context_data(self, **kwargs):
context = super(IndexView, self).get_context_data(**kwargs)
context['events'] = Event.objects.all().order_by('-created')[:6]
context['categories'] = Category.objects.all()
context['comments'] = Comments.objects.all()
return context
HTML模板
{% for event in events %}
<li class="span4 ">
<div class="thumbnail thumbnail-1">
<h3 class="titulo-fix" >{{ event.name }}</h3>
<img class="center-cropped" src="{{ event.image.url }}" alt="">
<section>
<a href="#"><h3>{{ event.category }} </h3></a>
<div class="meta">
<time datetime="2012-11-09" class="date-1"><i class="icon-calendar"></i> {{ event.start }}</time>
<div class="name-author"><i class="icon-user"></i> <a href="#">{{ event.organizer }}</a></div>
<a href="#" class="comments"><i class="icon-comment"></i> comments</a>
</div>
<div class="clear"></div>
<p>{{ event.place }}</p>
<a href="#" class="btn btn-1">Leer mas..</a>
</section>
</div>
</li>
{% endfor %}
我想在html的那个部分显示它所说的评论..当然还有一个标签,但我只是不知道这个标签或者怎么做。
答案 0 :(得分:3)
您可以在模型上创建一个帮助器方法,它可以帮助您显示注释的数量。
这样的事情:
class Event(TimeStampModel):
...
def comments_count(self):
#Your filter criteria can go here.
return self.comments_set.count()
并在评论中:
{{event.comments_count}}
More documentation on the reverse lookups can be found here
如果你没有过滤,就像@MadWombat提到的那样,你可以做到
{{event.comments_set.count}}