>From the 
>book<http://web2py.com/books/default/chapter/29/06#before-and-after-callbacks>
:
The return values of these callback should be None or False. If any of the 
_before_* callback returns a True value it will abort the actual 
insert/update/delete operation.

I'm guessing the 'return true' would break the chain, same as it does in 
the 'before' - but i'm not sure.

On Tuesday, January 8, 2013 9:00:41 AM UTC-7, Michael Schoonover wrote:
>
> How can I prevent the SQLFORM from deleting a record?  I have an ondelete 
> callback that I want to do the deletion, and I don't want the form to 
> subsequently attempt to delete the same record upon return from the 
> callback.
>
> Thanks in advance,
> Mike Schoonover
>

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