[英]How can I filter and count objects in DJANGO template?
您好我想問這個因為我是django的新手,我的麻煩是我想要計算有多少評論有帖子並將其放入html模板。 但問題是我使用for來收集數據庫中的所有事件,但我只想顯示“for”所顯示的每個事件的注釋計數。 這是我的模型,視圖和模板。 非常感謝。
楷模
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)
視圖
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的那個部分顯示它所說的評論..當然還有一個標簽,但我只是不知道這個標簽或者怎么做。
您可以在模型上創建輔助方法,以幫助您顯示注釋的數量。
像這樣的東西:
class Event(TimeStampModel):
...
def comments_count(self):
#Your filter criteria can go here.
return self.comments_set.count()
並在評論中:
{{event.comments_count}}
如果你沒有過濾,就像@MadWombat提到的那樣,你可以這樣做
{{event.comments_set.count}}
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.