Caching in Rails 3.2.8 including Cache Sweeping with Redis

application.rb

    # set default cache store as redis
    config.cache_store = :redis_store

cache_sweeper.rb

class FragmentSweeper < ActionController::Caching::Sweeper
  observe Listing

  def after_create(record)
     expire_cache_for(record)
  end

  def after_save(record)
    expire_cache_for(record)
  end

  def after_update(record)
    expire_cache_for(record)
  end

  def after_destroy(record)
    expire_cache_for(record)
  end

  private
    def expire_cache_for(record)
      @controller ||= ActionController::Base.new
      expire_fragment "listings/#{record.id}-#{record.updated_at.to_i}"
      Rails.logger.debug "***\n>>> Listing #{record.id} cache fragment expired!\n***" if Rails.env.development?
    end
end

development.rb

  config.action_controller.perform_caching = true

listings_controller.rb

class ListingsController < ApplicationController
  cache_sweeper :fragment_sweeper

  #...
end

show.html.erb

<%= cache @listing do %>
  <p>Content</p>
<% end %>