Rails - Sep 2007 - expire_page not working

I''ve enabled page caching on a site I''m currently
constructing.  The
sweeper is called upon any changes made to the model, as expected.
The sweeper code is as follows:

class PersonSweeper < ActionController::Caching::Sweeper

  observe Person

  def after_update(person)
    expire_staff_page
  end

  def after_destroy(person)
    expire_staff_page
  end

  def expire_staff_page
    $stderr.puts "@@@@@ Expiring staff page"
    expire_page( :controller => ''welcome'', :action =>
''staff'' )
    $stderr.puts "@@@@@ Staff Page Expired"
  end
end

In my administrative controller, I have

class Admin::PeopleController < Admin::AdminBaseController

  cache_sweeper :person_sweeper

and finally, in the public controller, I have

class WelcomeController < ApplicationController

  caches_page :staff

When I hit the public ''staff'' page, the cache file is created.
When
changes are made to the underlying data model, the sweeper method is
invoked, and I see

@@@@@ Expiring staff page
@@@@@ Staff Page Expired

in the server logs.  However, the generated file in public/welcome/
staff.html is not removed.

What am I doing wrong?


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Solved it. Instead of

expire_page( :controller => ''welcome'', :action =>
''staff'' )

I should have used

expire_page( :controller => ''/welcome'', :action =>
''staff'' )

I guess the issue was that I''m trying to expire content generated in a
controller different from the one that initially created the cached
page.  Instead of expiring ./public/welcome/staff.html, ./public/admin/
welcome/staff.html was being expired.  It didn''t exist, so of course
nothing happened.


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I ran into the same administration / sweeper problem.  Although I''ve
got it working,  I''m still unclear about how it all works.  My
revelation was that the admin controller needed the
cache_sweeper :person_sweeper ,  no the ''front'' controller.


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