On Tuesday 15 May 2007 2:50 pm, Dave Rolsky wrote:
> If the object has overloading, we want to use overload::StrVal instead of
> risking letting the object's stringification overloading kick in. That
> _is_ the problem you're seeing, somehow the overloading kicks in and
> throws an exception.
In the interest of explaining this, I investigated a little more, and I
thought I'd report it in case anyone cares to know.
I used Devel::Peek to examine the CDBI object before and after deletion, and I
think I understand now. The CDBI delete method, after deleting the object's
data from the DB, does this to the object's reference:
undef %$self;
bless $self, 'Class::DBI::Object::Has::Been::Deleted';
So although the underlying hash gets undef'ed, the reference is still intact,
with its internal OVERLOAD flag still set. But since it's now blessed into a
different (nonexistent) class, there's no overloaded operator hash, and the
stringify fails.
I discovered that this bogus object also causes overload::StrVal to fail in
overload 1.01 (perl 5.8.5). In overload 1.03 (perl 5.8.7) the StrVal method
is written differently and doesn't fail.
Again, thanks for the help.
-Charlie
--
Charlie Katz
Harvard-Smithsonian Center for Astrophysics
[EMAIL PROTECTED]
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