instiki/app/controllers/revision_sweeper.rb

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require_dependency 'cache_sweeping_helper'
class RevisionSweeper < ActionController::Caching::Sweeper
include CacheSweepingHelper
observe Revision, Page
def before_save(record)
if record.is_a?(Revision)
expire_cached_revisions(record.page)
end
end
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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_cached_summary_pages(page.web)
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pages_to_expire = ([page.name] + WikiReference.pages_that_reference(page.web, page.name) +
WikiReference.pages_redirected_to(page.web, page.name) +
WikiReference.pages_that_include(page.web, page.name)).uniq
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pages_to_expire.each { |page_name| expire_cached_page(page.web, page_name) }
end
end