Delete *really* means delete
simon at thegestalt.org
Thu Feb 24 22:31:59 GMT 2011
On Thu, Feb 24, 2011 at 09:17:41PM +0000, Matt Lawrence said:
> This will remove the caller's reference to the invocant, There's no way of
> knowing if that's the last reference, copying will keep it alive.
Yeah, that's what I think I was triggering last night.
> Neither of these approaches are particularly intuitive for the caller, you
> don't normally expect objects to mutate or disappear like this. If that's
> the lesser of two evils in your situation, fair enough. As long as the
> weirdness is documented clearly that's fair warning ;-)
To be honest it was more of an intellectual curiosity.
I've used similar techniques against for modules against web services
where a POST or PUT returns additional information (autogenerated id,
internal defaults etc etc)
is the same as
$object = $webservice->update($object);
But stuff disappearing from under you felt a little more ... unexpected.
Really evil thought ... someone else deletes the object from the DB at
the same time you're using it and your instance becomes undef from
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