class ActionView::Helpers::AtomFeedHelper::AtomFeedBuilder

def entry(record, options = {})

* :type: The TYPE for this entry. Defaults to "text/html".
* :id: The ID for this entry. Defaults to "tag:#{@view.request.host},#{@feed_options[:schema_date]}:#{record.class}/#{record.id}"
* :url: The URL for this entry or +false+ or +nil+ for not having a link tag. Defaults to the +polymorphic_url+ for the record.
* :updated: Time of update. Defaults to the updated_at attribute on the record if one such exists.
* :published: Time first published. Defaults to the created_at attribute on the record if one such exists.

Options:

Creates an entry tag for a specific record and prefills the id using class and id. 
def entry(record, options = {})
  @xml.entry do
    @xml.id(options[:id] || "tag:#{@view.request.host},#{@feed_options[:schema_date]}:#{record.class}/#{record.id}")
    if options[:published] || (record.respond_to?(:created_at) && record.created_at)
      @xml.published((options[:published] || record.created_at).xmlschema)
    end
    if options[:updated] || (record.respond_to?(:updated_at) && record.updated_at)
      @xml.updated((options[:updated] || record.updated_at).xmlschema)
    end
    type = options.fetch(:type, "text/html")
    url = options.fetch(:url) { @view.polymorphic_url(record) }
    @xml.link(rel: "alternate", type: type, href: url) if url
    yield AtomBuilder.new(@xml)
  end
end