Take a look at 
ActiveRecord::Dirty<http://api.rubyonrails.org/classes/ActiveRecord/Dirty.html>
--
Benjamin Curtis
http://railskits.com/ - Ready-made Rails code
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http://www.bencurtis.com/ - Personal blog



On Wed, May 27, 2009 at 7:25 AM, JL Smith <[email protected]> wrote:

>
> What's the best way to examine what fields on a model are changing?
> Would you use a callback to do that and how?
>
> I guess the simplest example of this is how lighthouseapp documents
> changes that a person makes to a ticket:
>
> Milestone changed from “2.x” to “3.0”
>
> State changed from “new” to “open”
>
> How could I accomplish the same thing?
> >
>

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