versions were added.

Author: bguban

README.md

@@ -94,6 +94,8 @@ class ListsController < ApplicationController
 
   # custom cache path with a proc
   caches_action :history, cache_path: -> { request.domain }
+  
+  caches_action :show, version: -> { @list.cache_version }
 
   # custom cache path with a symbol
   caches_action :feed, cache_path: :user_cache_path

lib/action_controller/caching/actions.rb

@@ -111,7 +111,7 @@ def caches_action(*actions)
           options = actions.extract_options!
           options[:layout] = true unless options.key?(:layout)
           filter_options = options.extract!(:if, :unless).merge(only: actions)
-          cache_options  = options.extract!(:layout, :cache_path).merge(store_options: options)
+          cache_options  = options.extract!(:layout, :cache_path, :version).merge(store_options: options)
 
           around_action ActionCacheFilter.new(cache_options), filter_options
         end
@@ -147,15 +147,18 @@ def expire_action(options = {})
 
       class ActionCacheFilter # :nodoc:
         def initialize(options, &block)
-          @cache_path, @store_options, @cache_layout =
-            options.values_at(:cache_path, :store_options, :layout)
+          @cache_path, @store_options, @cache_layout, @version =
+            options.values_at(:cache_path, :store_options, :layout, :version)
         end
 
         def around(controller)
           cache_layout = expand_option(controller, @cache_layout)
           path_options = expand_option(controller, @cache_path)
+          version = expand_option(controller, @version)
           cache_path = ActionCachePath.new(controller, path_options || {})
 
+          @store_options.merge!(version: version)
+
           body = controller.read_fragment(cache_path.path, @store_options)
 
           unless body