Re: [SQLObject] Inheritance strangeness

[<ab...@ne...>]

Quoting Oleg Broytmann <ph...@ph...>:
> On Fri, Jun 03, 2005 at 07:05:50PM +1000, ab...@ne... wrote:
> > I've discovered what seems to be a bug in sqlobject class inheritance=
.
>=20
>    I have committed a patch at the revision 810 that should fix this
> problem and also all problems with inherited tables with no attributes.
> Please give it a try and report.

Seems to be fixed now - thanks very much!

> > in my situation not all
> > my inherited classes define extra attributes (e.g. they instead have
> > different behaviour etc.)
> =20
>     PS. I wonder how do they have different behavior without any
>  attributes? Via properties, I suppose?

The subclasses have different behaviour in that they all have a method ca=
lled
e.g. 'Do' but implement it differently.  Some subclasses need extra attri=
butes
in order to support their particular imlpementation, other subclasses don=
't.

I've actually implemented a reasonably complex 'state design pattern' and=
 the
states are subclasses, which are all persisted via sqlobject.  Thank good=
ness
sqlobject came with inheritance support - and I think such an elegant way=
 of
doing it too.

Andy Bulka
http://www.atug.com/andypatterns



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