Change *_filter to *_action

`before_filter` is now `before_action`. I've changed this to remove the
deprecation warning.

Author: eileencodes

README.md

@@ -29,7 +29,7 @@ authentication and other restrictions on whether someone is allowed
 to execute such action.
 
     class ListsController < ApplicationController
-      before_filter :authenticate, except: :public
+      before_action :authenticate, except: :public
 
       caches_page   :public
       caches_action :index, :show
@@ -72,7 +72,7 @@ interval (in seconds) to schedule expiration of the cached item.
 The following example depicts some of the points made above:
 
     class ListsController < ApplicationController
-      before_filter :authenticate, except: :public
+      before_action :authenticate, except: :public
 
       caches_page :public
 

lib/action_controller/caching/actions.rb

@@ -10,7 +10,7 @@ module Caching
     # to execute such action.
     #
     #   class ListsController < ApplicationController
-    #     before_filter :authenticate, except: :public
+    #     before_action :authenticate, except: :public
     #
     #     caches_page   :public
     #     caches_action :index, :show
@@ -66,7 +66,7 @@ module Caching
     #
     #
     #   class ListsController < ApplicationController
-    #     before_filter :authenticate, except: :public
+    #     before_action :authenticate, except: :public
     #
     #     caches_page :public
     #
@@ -113,7 +113,7 @@ def caches_action(*actions)
           filter_options = options.extract!(:if, :unless).merge(only: actions)
           cache_options  = options.extract!(:layout, :cache_path).merge(store_options: options)
 
-          around_filter ActionCacheFilter.new(cache_options), filter_options
+          around_action ActionCacheFilter.new(cache_options), filter_options
         end
       end
 

test/caching_test.rb

@@ -25,9 +25,9 @@ class ActionCachingTestController < CachingController
   end
 
   # Eliminate uninitialized ivar warning
-  before_filter { @title = nil }
+  before_action { @title = nil }
 
-  before_filter only: :with_symbol_format do
+  before_action only: :with_symbol_format do
     request.params[:format] = :json
   end