@register.simple_tag

def get_categories():

    return Category.objects.all()

@register.simple_tag

def get_entry_count_of_category(category_name):

    return Entry.objects.filter(category__name=category_name).count()

 <div class="row">

    <div class="widget">

        <h3>分类:</h3>

        {% get_categories as category_list %}

        <ul class="list-group">

        {% for category in category_list %}

            <li class="list-group-item">

                <a href="{% url 'blog:blog_category' category.id %}">{{ category.name }}</a>

                <span class="badge">{% get_entry_count_of_category category.name %}</span>

            </li>

        {% endfor %}

        </ul>

    </div>

</div>

url(r'^archives/(?P<year>[0-9]+)/(?P<month>[0-9]+)$', views.archives, name='blog_archives'),

def archives(request, year, month):

    entries = models.Entry.objects.filter(created_time__year=year, created_time__month=month)

    page = request.GET.get('page', 1)

    entry_list, paginator = make_paginator(entries, page)

    page_data = pagination_data(paginator, page)

    return render(request, 'blog/index.html', locals())

@register.simple_tag

def archives():

    return Entry.objects.dates('created_time', 'month', order='DESC')

@register.simple_tag

def get_entry_count_of_date(year, month):

    return Entry.objects.filter(created_time__year=year, created_time__month=month).count()

<div class="row">

    <div class="widget">

        <h3>归档:</h3>

        {% archives as date_list %}

        <ul class="list-group">

        {% for date in date_list %}

            <li class="list-group-item">

                <a href="{% url 'blog:blog_archives' date.year date.month %}">

                    <i class="glyphicon glyphicon-chevron-right"></i>

                    {{ date.year }} 年 {{ date.month }} 月

                    <span class="badge">{% get_entry_count_of_date date.year date.month %}</span>

                </a>

            </li>

        {% endfor %}

        </ul>

    </div>

</div>

@register.simple_tag

def get_tags():

    return Tag.objects.all()

<div class="row">

    <div class="widget" >

        <h3>标签云:</h3>

        {% get_tags as tag_list %}

        {% for tag in tag_list %}

                <a href="{% url 'blog:blog_tag' tag.id %}" style="font-size: 20px;">

                    <span style="padding: 5px;" class="label {% cycle 'label-default' 'label-primary' 'label-success' 'label-info' 'label-warning' 'label-danger' %}">{{ tag.name }}</span>

                </a>&nbsp;

        {% endfor %}

    </div>

</div>

from django.contrib.syndication.views import Feed

# from django.urls import reverse

from .models import Entry

class LatestEntriesFeed(Feed):

    title = "Zhang_derek的博客"

    link = "/siteblogs/"

    description = "zhang_derek的最新博客文章！"

    def items(self):

        return Entry.objects.order_by('-created_time')[:5]

    def item_title(self, item):

        return item.title

    def item_description(self, item):

        return item.abstract

from blog.feed import LatestEntriesFeed

url(r'^latest/feed/$', LatestEntriesFeed()),    #RSS订阅

<div class="row">

    <div class="rss">

        <a href="/latest/feed/"><i class="glyphicon glyphicon-plus"></i>RSS 订阅</a>

    </div>

</div>