Module | ActionView::Helpers::AtomFeedHelper
In: | lib/action_view/helpers/atom_feed_helper.rb

### Methods

atom_feed

### Classes and Modules

Class ActionView::Helpers::AtomFeedHelper::AtomFeedBuilder

### Public Instance methods

atom_feed(options = {}) {|AtomFeedBuilder.new(xml, self, options)| ...}

Full usage example:

      config/routes.rb:
        ActionController::Routing::Routes.draw do |map|
          map.resources :posts
          map.root :controller => "posts"
        end

      app/controllers/posts_controller.rb:
        class PostsController < ApplicationController::Base
          # GET /posts.html
          # GET /posts.atom
          def index
            @posts = Post.find(:all)

            respond_to do |format|
              format.html
              format.atom
            end
          end
        end

      app/views/posts/index.atom.builder:
        atom_feed do |feed|
          feed.title("My great blog!")
          feed.updated((@posts.first.created_at))

          for post in @posts
            feed.entry(post) do |entry|
              entry.title(post.title)
              entry.content(post.body, :type => 'html')

              entry.author do |author|
                author.name("DHH")
              end
            end
          end
        end

The options for atom_feed are:

- `:language`: Defaults to "en-US".
- `:root_url`: The HTML alternative that this feed is doubling for. Defaults to / on the current host.
- `:url`: The URL for this feed. Defaults to the current URL.
- `:schema_date`: The date at which the tag scheme for the feed was first used. A good default is the year you created the feed. See feedvalidator.org/docs/error/InvalidTAG.html for more information. If not specified, 2005 is used (as an "I don‘t care" value).

Other namespaces can be added to the root element:

      app/views/posts/index.atom.builder:
        atom_feed({'xmlns:app' => 'http://www.w3.org/2007/app',
            'xmlns:openSearch' => 'http://a9.com/-/spec/opensearch/1.1/'}) do |feed|
          feed.title("My great blog!")
          feed.updated((@posts.first.created_at))
          feed.tag!(openSearch:totalResults, 10)

          for post in @posts
            feed.entry(post) do |entry|
              entry.title(post.title)
              entry.content(post.body, :type => 'html')
              entry.tag!('app:edited', Time.now)

              entry.author do |author|
                author.name("DHH")
              end
            end
          end
        end

atom_feed yields an AtomFeedBuilder instance.

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