[Dbix-class] on_field_change DBIC hooks

[Pedro Melo]

Hi,

I implementing a "on_field_change" hook. External classes can hook  
the DBIC model to observe (usually) status changes and start some  
business logic processes. The reason I choose this approach is that  
it creates a loosely coupled system, where I can add other components  
later without going back and modifying old code.

 From my first look through the code, I think the set_column() is the  
proper place to do this. But we could set_column() and then not update 
().

So update() and look at the dirty columns is probably safer.

If I want to trigger on insert also, I also have to watch for insert().

Another option is to create an InflateColumn::Trigger and use that,  
but it might not be what people expect.

Before I start coding, has anybody done this before? Suggestions?

Best regards,
-- 
Pedro Melo
Blog: http://www.simplicidade.org/notes/
XMPP ID: melo at simplicidade.org
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