咦，为DJANGO的ORM的QUERYSET增加数据列的样码，很好用哟

if self.kwargs:
if self.kwargs.has_key('search_pk'):
return Server.objects.filter(name__icontains=self.kwargs['search_pk']).annotate(num_subserver=Count('subserver'))
else:
return Server.objects.annotate(num_subserver=Count('subserver'))

{% if item.num_subserver < 1 %}
<span class="uk-badge  uk-badge-warning">{{item.num_subserver}}</span>
{% elif item.num_subserver > 1 %}
<a href="{% url 'subserverinput:subserverinput-list-search' search_pk=item.ipaddress %}">
<span class="uk-badge uk-badge-danger">{{item.num_subserver}}</span>
</a>
{% else %}
<a href="{% url 'subserverinput:subserverinput-list-search' search_pk=item.ipaddress %}">
<span class="uk-badge uk-badge-success">{{item.num_subserver}}</span>
</a>
{% endif %}