vhenry wrote:
> I'd like to be able to both display rss feeds from other sites on my
> website and also to eventually produce rss feeds from my own content.
>
> Can someone point me to a tutorial on how to do this? I found one that
> had code examples, but neglected to tell me where/which files to put
> the code.
Hi - here's a quick how-to...
create a controller called 'feeds'
create an action in this controller called "rss"
create a route to this action in your routes folder like so:
map.rss "rss", :controller => "feeds", :action => "rss", :format => :rss
Let's assume you have a model called Post and this feed is for all of
your posts.
The rss action in your feeds controller should look like:
def rss
@posts = Post.all :order => "created_at DESC"
end
create a view template for this feed called "rss.rss.builder"
Note - the first rss is the name of the template, the second is the
format of the template.
the view should look something like this:
xml.instruct!
xml.rss "version" => "2.0",
"xmlns:dc" => "htt://purl.org/dc/elements/1.1/" do
xml.channel do
xml.title "the title of your feed goes here"
xml.description "write a short description"
xml.pubDate CGI.rfc1123_date @posts.first.created_at if @posts.any?
xml.link url_for :only_path => false, :controller => 'posts'
xml.guid url_for :only_path => false, :controller => "posts"
xml.lastBuildDate CGI.rfc1123_date @posts.first.updated_at if
@posts.any?
xml.language "en"
@posts.each do |post|
xml.item do
xml.title post.title
xml.description post.body[0..500]
xml.link url_for :only_path => false,
:controller => 'posts',
:action => 'show',
:id => post
xml.pubDate CGI.rfc1123_date post.updated_at
xml.guid url_for :only_path => false,
:controller => 'post',
:action => 'show',
:id => post
xml.author post.user.username
end
end
end
end
Now all you have to do is add <%= link_to "rss feed", rss_path %> to
your view and, if you like, <%= auto_discovery_link_tag :rss, rss_path
%> to the <head></head> of your layout
read about the RSS specifications here:
http://cyber.law.harvard.edu/rss/rss.html
Hope that helps?
Gavin
http://handyrailstips.com
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