Fix action-cached exception responses.

Methods raising ActiveRecord::RecordNotFound were returning 404 on first request and 200 OK with blank body on subsequent requests.

[#2533 state:committed]
Signed-off-by: NJeremy Kemper <jeremy@bitsweat.net>

actionpack/lib/action_controller/caching/actions.rb

@@ -61,7 +61,9 @@ def caches_action(*actions)
           filter_options = { :only => actions, :if => options.delete(:if), :unless => options.delete(:unless) }
 
           cache_filter = ActionCacheFilter.new(:layout => options.delete(:layout), :cache_path => options.delete(:cache_path), :store_options => options)
-          around_filter(cache_filter, filter_options)
+          around_filter(filter_options) do |controller, action|
+            cache_filter.filter(controller, action)
+          end
         end
       end
 
@@ -83,6 +85,12 @@ def initialize(options, &block)
           @options = options
         end
 
+        def filter(controller, action)
+          should_continue = before(controller)
+          action.call if should_continue
+          after(controller)
+        end
+
         def before(controller)
           cache_path = ActionCachePath.new(controller, path_options_for(controller, @options.slice(:cache_path)))
           if cache = controller.read_fragment(cache_path.path, @options[:store_options])

actionpack/test/controller/caching_test.rb

 require 'fileutils'
 require 'abstract_unit'
+require 'active_record_unit'
 
 CACHE_DIR = 'test_cache'
 # Don't change '/../temp/' cavalierly or you might hose something you don't want hosed
@@ -153,6 +154,7 @@ class ActionCachingTestController < ActionController::Base
   caches_action :edit, :cache_path => Proc.new { |c| c.params[:id] ? "http://test.host/#{c.params[:id]};edit" : "http://test.host/edit" }
   caches_action :with_layout
   caches_action :layout_false, :layout => false
+  caches_action :record_not_found, :four_oh_four, :simple_runtime_error
 
   layout 'talk_from_action.erb'
 
@@ -175,6 +177,18 @@ def with_layout
     render :text => @cache_this, :layout => true
   end
 
+  def record_not_found
+    raise ActiveRecord::RecordNotFound, "oops!"
+  end
+
+  def four_oh_four
+    render :text => "404'd!", :status => 404
+  end
+
+  def simple_runtime_error
+    raise "oops!"
+  end
+
   alias_method :show, :index
   alias_method :edit, :index
   alias_method :destroy, :index
@@ -458,6 +472,27 @@ def test_file_extensions
     assert_response :success
   end
 
+  def test_record_not_found_returns_404_for_multiple_requests
+    get :record_not_found
+    assert_response 404
+    get :record_not_found
+    assert_response 404
+  end
+
+  def test_four_oh_four_returns_404_for_multiple_requests
+    get :four_oh_four
+    assert_response 404
+    get :four_oh_four
+    assert_response 404
+  end
+
+  def test_simple_runtime_error_returns_500_for_multiple_requests
+    get :simple_runtime_error
+    assert_response 500
+    get :simple_runtime_error
+    assert_response 500
+  end
+
   private
     def content_to_cache
       assigns(:cache_this)