rosa-build/app/controllers/activity_feeds_controller.rb

class ActivityFeedsController < ApplicationController
  before_filter :authenticate_user!

  def index
    @filter = t('feed_menu').has_key?(params[:filter].try(:to_sym)) ? params[:filter].to_sym : :all
    @activity_feeds = current_user.activity_feeds
    @activity_feeds = @activity_feeds.where(:kind => "ActivityFeed::#{@filter.upcase}".constantize) unless @filter == :all

    @activity_feeds = @activity_feeds.paginate :page => params[:page]
  end
end