How do I publish an RSS feed from my rails app?

I have a simple blog setup with a posts model. Is there a gem that can publish a feed or should I create thus from scratch?

Hey Stan! Like an XML feed of them? If so, it's relatively easy. You've just got to create an index.xml.builder view which will let you render XML.

You can access all the instance variables you need from the controller just like a normal view so you can loop through the posts and print them out in the XML. I believe you'll want the tags and structure mentioned in the following example to conform to what the feeds need for tags.

Basecamp uses this for their feed, for example:

xml.rss("version" => "2.0", "xmlns:dc" => "http://purl.org/dc/elements/1.1/") do
  xml.channel do
    xml.title(@feed_title)
    xml.link(@url)
    xml.description "Basecamp: Recent items"
    xml.language "en-us"
    xml.ttl "40"

    @recent_items.each do |item|
      xml.item do
        xml.title(item_title(item))
        xml.description(item_description(item)) if item_description(item)
        xml.pubDate(item_pubDate(item))
        xml.guid(@person.firm.account.url + @recent_items.url(item))
        xml.link(@person.firm.account.url + @recent_items.url(item))

        xml.tag!("dc:creator", item.author_name) if item_has_creator?(item)
      end
    end
  end
end

Thanks!