gistfile1.rb

# A paginated list of recently-added photos
def index   
  @photos = Photo.paginate(
    :per_page => 36,
    :page     => page,
    :order    => "photos.created_at DESC"
  )
  respond_to do |format|
    format.html {
      render :action => "list"
    }
    format.js {
      render :json => @photos.to_json
    }
    format.xml {
      render :xml => @photos.to_xml
    }
    format.atom {
      render :action => "list"
    }
  end                          
end