Rails 3 - Atom Feed Help Needed? - ruby-on-rails-3

Question

Am having trouble getting the Atom feed function to work on my blog. I am using the Kaminari plug-in to paginate my articles - 6 per page. With the code below, when a user clicks on the RSS Feed image they are asked to log-in instead of subscribing to the feed! Any help would be appreciated with this issue...
application.html.erb
page head <%= auto_discovery_link_tag(:atom, feed_path, { :title => "My ATOM Feed" }) %>
page body <%= image_tag("feed.png", {:alt => 'Atom feed', :class=>"feed"}) %>Subscribe
routes.rb
match '/feed' => 'articles#feed', :as => :feed, :defaults => { :format => 'atom' }
articles_controller
class ArticlesController < ApplicationController
before_filter :authenticate_user!, :except => [:index, :show]
# GET /articles
# GET /articles.xml
# display articles on the home page
def index
#articles = Article.published.page(params[:page]).per(6).ordered
respond_to do |format|
format.html # index.html.erb
format.xml { render :xml => #articles }
format.atom { render :atom => #articles }
end
end
# GET /articles/1
# GET /articles/1.xml
def show
#article = Article.find(params[:id])
#comment = Comment.new(:article=>#article)
respond_to do |format|
format.html # show.html.erb
format.xml { render :xml => #article }
end
end
# GET /articles/new
# GET /articles/new.xml
def new
#article = Article.new
respond_to do |format|
format.html # new.html.erb
format.xml { render :xml => #article }
end
end
# GET /articles/1/edit
def edit
#article = Article.find(params[:id])
authorize! :edit, #article
end
# POST /articles
# POST /articles.xml
def create
#authorize! :create, #article
#article = Article.new(params[:article])
#article.user_id = current_user.id
respond_to do |format|
if #article.save
format.html { redirect_to(#article, :notice => 'Worry was successfully created.') }
format.xml { render :xml => #article, :status => :created, :location => #article }
else
format.html { render :action => "new" }
format.xml { render :xml => #article.errors, :status => :unprocessable_entity }
end
end
end
# PUT /articles/1
# PUT /articles/1.xml
def update
#article = Article.find(params[:id])
authorize! :update, #article
respond_to do |format|
if #article.update_attributes(params[:article])
format.html { redirect_to(#article, :notice => 'Worry was successfully updated.') }
format.xml { head :ok }
else
format.html { render :action => "edit" }
format.xml { render :xml => #article.errors, :status => :unprocessable_entity }
end
end
end
# DELETE /articles/1
# DELETE /articles/1.xml
def destroy
#article = Article.find(params[:id])
authorize! :destroy, #article
#article.destroy
respond_to do |format|
format.html { redirect_to(articles_url) }
format.xml { head :ok }
end
end
end
views/articles/feed.atom.builder
atom_feed :language => 'en-US' do |feed|
feed.title "mysite.com"
feed.updated(#articles.blank? ? Time.now : #articles.first.created_at)
#articles.each do |article|
feed.entry article, :published => article.accepted do |entry|
entry.title article.title
entry.author do |author|
author.name article.user.fullname
end
end
end
end

Answer 1

Update this line in your articles_controller:
before_filter :authenticate_user!, :except => [:index, :show]
... with:
before_filter :authenticate_user!, :except => [:index, :show, :feed]
This will prevent the request for authentication.

Answer 2

Two suggestions:
1) Add :url and :root_url to the atom_feed call.
2) Change:
feed.updated #articles.first.created_at
to:
feed.updated(#articles.blank? ? Time.now : #articles.first.created_at)