Caching and sweeping pages. RSS feeds behave funny

app/controllers/revision_sweeper.rb

@@ -0,0 +1,24 @@
+class RevisionSweeper < ActionController::Caching::Sweeper
+  observe Revision, Page
+  
+  def after_save(record)
+    if record.is_a?(Revision)
+      expire_caches(record.page)
+    end
+  end
+  
+  def after_delete(record)
+    if record.is_a?(Page)
+      expire_caches(record)
+    end
+  end
+  
+  private
+  
+  def expire_caches(page)
+    expire_page :controller => 'wiki', :web => page.web.address,
+        :action => %w(show published), :id => page.name
+    expire_page :controller => 'wiki', :web => page.web.address,
+        :action => %w(authors recently_revised list rss_with_content rss_with_headlines)
+  end
+end

app/controllers/wiki_controller.rb

@@ -6,8 +6,9 @@ require 'zip/zip'
 class WikiController < ApplicationController
 
   # TODO implement cache sweeping
-  caches_page :show, :published
-  
+  caches_page :show, :published, :authors, :recently_revised, :list, :rss_with_content, :rss_with_headlines
+  cache_sweeper :revision_sweeper
+
   layout 'default', :except => [:rss_feed, :rss_with_content, :rss_with_headlines, :tex,  :export_tex, :export_html]
 
   def index
@@ -194,6 +195,7 @@ class WikiController < ApplicationController
       redirect_to_page @page_name
     rescue => e
       flash[:error] = e
+      logger.error e
       flash[:content] = @params['content']
       if @page
         @page.unlock