在 Rails 3 中生成 RSS 提要 [英] Generating RSS feed in Rails 3
问题描述
我正在寻找在 Rails 3 中生成提要的最佳实践/标准模式.是 http://railscasts.com/episodes/87-generate-rss-feeds 仍然有效吗?
I'm looking for a best practice/standard pattern for generating feeds in Rails 3. Is http://railscasts.com/episodes/87-generating-rss-feeds still valid?
推荐答案
首先，现在我建议使用 ATOM 提要而不是 RSS.
在国际化、内容类型和其他方面，ATOM 提要的规范比 RSS 提供了更多价值每个现代提要阅读器都支持它.
The specification of ATOM feed offers more value than the RSS one with internationalization, content types and other things and every modern feed reader supports it.
有关 ATOM 与 RSS 的更多信息，请访问:
More info about ATOM vs RSS can be found at:
- 维基百科 ATOM 条目
- 专业博客 和 Free Marketing Zone 关于该主题的博文
- the Wikipedia ATOM entry
- PRO Blogger and Free Marketing Zone blog posts about the subject
关于编码:
这个例子假设:
- 一个名为
NewsItem的模型，具有以下属性:title内容author_name
- a model called
NewsItemwith the following attributes:titlecontentauthor_name
我们将为此使用构建器模板和 Ruby on Rails atom_feed helper 这很有用.
We'll use a builder template for this and the Ruby on Rails atom_feed helper which is of great use.
1.将动作添加到控制器
转到
app/controllers/news_items_controller.rb并添加:def feed # this will be the name of the feed displayed on the feed reader @title = "FEED title" # the news items @news_items = NewsItem.order("updated_at desc") # this will be our Feed's update timestamp @updated = @news_items.first.updated_at unless @news_items.empty? respond_to do |format| format.atom { render :layout => false } # we want the RSS feed to redirect permanently to the ATOM feed format.rss { redirect_to feed_path(:format => :atom), :status => :moved_permanently } end end2.设置您的构建器模板
现在让我们添加模板来构建提要.
Now let's add the template to build the feed.
转到
app/views/news_items/feed.atom.builder并添加:atom_feed :language => 'en-US' do |feed| feed.title @title feed.updated @updated @news_items.each do |item| next if item.updated_at.blank? feed.entry( item ) do |entry| entry.url news_item_url(item) entry.title item.title entry.content item.content, :type => 'html' # the strftime is needed to work with Google Reader. entry.updated(item.updated_at.strftime("%Y-%m-%dT%H:%M:%SZ")) entry.author do |author| author.name entry.author_name end end end end3.用路由连接起来
这将默认调用 ATOM 格式的操作并将
/feed.rss重定向到/feed.atom.This will call the action with the ATOM format by default and redirect
/feed.rssto/feed.atom.转到
config/routes.rb并添加:resources :news_items match '/feed' => 'news_items#feed', :as => :feed, :defaults => { :format => 'atom' }4.在布局上添加指向 ATOM 和 RSS 提要的链接
最后，剩下的就是将提要添加到布局中.
Finally, all that is left is to add the feed to the layout.
转到
app/views/layouts/application.html.erb并将其添加到您的<head></head>部分:Go to
app/views/layouts/application.html.erband add this your<head></head>section:<%= auto_discovery_link_tag :atom, "/feed" %> <%= auto_discovery_link_tag :rss, "/feed.rss" %><小时>
其中可能有一两个错字，所以如果这对您有用，请告诉我.
There may be a typo or two in that, so let me know if this works for you.
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