instiki/app/controllers/revision_sweeper.rb

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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)
web = page.web
expire_action :controller => 'wiki', :web => web.address,
:action => %w(show published), :id => page.name
expire_action :controller => 'wiki', :web => web.address,
:action => %w(authors recently_revised list)
expire_fragment :controller => 'wiki', :web => web.address,
:action => %w(rss_with_headlines rss_with_content)
end
end