Rails - Sep 2010 - Re: Call expire_fragment from outside sweepers or controllers

xponrails wrote:
> Hi all.
> 
> I need to expire cached fragments from outside sweepers or
> controllers: I have a rake task that calls a method inside a module in
> the /lib directory. This task will be called at a scheduled time by a
> crontab job.
> 
> After method execution I would like to expire some cached fragments.
> 
> I''ve just tried to import ActionController::Caching and
> ActionController::Caching::Fragment, but without success.
> 
> Do you have any suggestions?
I had exactly the same problem and managed to come up with a solution 
(albeit with a couple of limitations). My solution involves keeping all 
the code in the Sweeper and calling it via a class method, so it should 
work anywhere. See my blog entry for an explanation and the code.

http://stevencummings.name/2010/09/07/expire_fragment-with-rake-and-as-a-model-only-observer

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