RSS和分页
RSS功能
Django是一个全面型框架, 很多功能都可以直接找到, 对于RSS功能, 可以从其中的高层框架的聚合Feed框架中找到(The syndication feed framework)
上层Feed生成框架可以直接应用Feed类, 我们可以直接继承Feed在其中定义自己的方法
在my_blog/article/views.py中定义类
from django.contrib.syndication.views import Feed #注意加入import语句
class RSSFeed(Feed) :
title = "RSS feed - article"
link = "feeds/posts/"
description = "RSS feed - blog posts"
def items(self):
return Article.objects.order_by('-date_time')
def item_title(self, item):
return item.title
def item_pubdate(self, item):
return item.add_date
def item_description(self, item):
return item.content
然后在my_blog/my_blog/urls.py中设置对应的url
from django.conf.urls import patterns, include, url
from django.contrib import admin
from article.views import RSSFeed
urlpatterns = patterns('',
# Examples:
# url(r'^$', 'my_blog.views.home', name='home'),
# url(r'^blog/', include('blog.urls')),
url(r'^admin/', include(admin.site.urls)),
url(r'^$', 'article.views.home', name = 'home'),
url(r'^(?P<id>\d+)/$', 'article.views.detail', name='detail'),
url(r'^archives/$', 'article.views.archives', name = 'archives'),
url(r'^aboutme/$', 'article.views.about_me', name = 'about_me'),
url(r'^tag(?P<tag>\w+)/$', 'article.views.search_tag', name = 'search_tag'),
url(r'^search/$','article.views.blog_search', name = 'search'),
url(r'^feed/$', RSSFeed(), name = "RSS"), #新添加的urlconf, 并将name设置为RSS, 方便在模板中使用url
)
下面修改my_blog/templates/base.html, 在其中添加RSS按钮
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="description" content="A layout example that shows off a blog page with a list of posts.">
<title>{% block title %} Andrew Liu Blog {% endblock %}</title>
<link rel="stylesheet" href="http://yui.yahooapis.com/pure/0.5.0/pure-min.css">
<link rel="stylesheet" href="http://yui.yahooapis.com/pure/0.5.0/grids-responsive-min.css">
<link rel="stylesheet" href="http://picturebag.qiniudn.com/blog.css">
<link rel="stylesheet" href="http://picturebag.qiniudn.com/monokai.css">
</head>
<body>
<div id="layout" class="pure-g">
<div class="sidebar pure-u-1 pure-u-md-1-4">
<div class="header">
<h1 class="brand-title"><a href="{% url "home" %}">Andrew Liu Blog</a></h1>
<h2 class="brand-tagline">雪忆 - Snow Memory</h2>
<nav class="nav">
<ul class="nav-list">
<li class="nav-item">
<a class="button-success pure-button" href="/">主页</a>
</li>
<li class="nav-item">
<a class="button-success pure-button" href="{% url "archives" %}">归档</a>
</li>
<li class="nav-item">
<a class="pure-button" href="https://github.com/Andrew-liu/my_blog_tutorial">Github</a>
</li>
<li class="nav-item">
<a class="button-error pure-button" href="http://weibo.com/dinosaurliu">Weibo</a>
</li>
<li class="nav-item">
<a class="button-success pure-button" href="/">专题</a>
</li>
<li>
<form class="pure-form" action="/search/" method="get">
<input class="pure-input-3-3" type="text" name="s" placeholder="search">
</form>
</li>
<li class="nav-item">
<a class="button-success pure-button" href="{% url "about_me" %}">About Me</a>
</li>
<li class="nav-item">
<a class="button-success pure-button" href="{% url "RSS" %}">RSS</a>
</li>
</ul>
</nav>
</div>
</div>
<div class="content pure-u-1 pure-u-md-3-4">
<div>
{% block content %}
{% endblock %}
<div class="footer">
<div class="pure-menu pure-menu-horizontal pure-menu-open">
<ul>
<li><a href="http://andrewliu.tk/about/">About Me</a></li>
<li><a href="http://twitter.com/yuilibrary/">Twitter</a></li>
<li><a href="http://github.com/yahoo/pure/">GitHub</a></li>
</ul>
</div>
</div>
</div>
</div>
</div>
</body>
</html>
保存后, 在浏览器中输入http://127.0.0.1:8000/可以看到新增的RSS按钮, 点击看以看到对应的效果
更多功能可以查看The syndication feed framework官方文档
分页功能
当博客文章较多的时候, 我们并不希望以此在主页上显示全部的博客文章, 而是希望能够每页显示固定的文章数目, 这样既能提高性能, 也能提高美观度, 何乐而不为呢?
现在这一章节来看看怎么实现分页功能
- 首先添加包
- 重写home方法
- 修改模板
修改my_blog/my_blog/views.py中的home函数
from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger #添加包
def home(request):
posts = Article.objects.all() #获取全部的Article对象
paginator = Paginator(posts, 2) #每页显示两个
page = request.GET.get('page')
try :
post_list = paginator.page(page)
except PageNotAnInteger :
post_list = paginator.page(1)
except EmptyPage :
post_list = paginator.paginator(paginator.num_pages)
return render(request, 'home.html', {'post_list' : post_list})
修改my_blog/templates下的home.html
{% extends "base.html" %}
{% load custom_markdown %}
{% block content %}
<div class="posts">
{% for post in post_list %}
<section class="post">
<header class="post-header">
<h2 class="post-title"><a href="{% url "detail" id=post.id %}">{{ post.title }}</a></h2>
<p class="post-meta">
Time: <a class="post-author" href="#">{{ post.date_time |date:"Y M d"}}</a> <a class="post-category post-category-js" href="{% url "search_tag" tag=post.category %}">{{ post.category|title }}</a>
</p>
</header>
<div class="post-description">
<p>
{{ post.content|custom_markdown|truncatewords:10 }}
</p>
</div>
<a class="pure-button" href="{% url "detail" id=post.id %}">Read More >>> </a>
</section>
{% endfor %}
{% if post_list.object_list and post_list.paginator.num_pages > 1 %}
<div>
<ul class="pager">
{% if post_list.has_previous %}
<li><a href="?page={{ post_list.previous_page_number }}">上一页</a></li>
{% endif %}
{% if post_list.has_next %}
<li><a href="?page={{ post_list.next_page_number }}">下一页</a></li>
{% endif %}
</ul>
</div>
{% endif %}
</div><!-- /.blog-post -->
{% endblock %}
我设置的是每页显示两篇博文, 可以修改成其他数值
更多细节可以查看pagination官方文档
保存后, 在浏览器中输入http://127.0.0.1:8000/可以看到新增的下一页按钮(博客文章要多加几篇), 点击看以看到对应的效果
到目前为止, 博客的基本功能都实现了, 下一篇我们将讲到怎么在云端进行部署
最后我们把整个blog更新到github仓库中
$ git add . #添加全部更新到暂存区
$ git commit -m "rss and paginator" #提交到git
[master b53356b] rss and paginator
2 files changed, 24 insertions(+), 1 deletion(-)
$ git push #提交到github中