[ZODB-Dev] problem with broken

[Stephan Richter]

On Wednesday 05 November 2008, Christian Theune wrote:
> On Wed, 2008-11-05 at 11:31 +0100, Laurence Rowe wrote:
> > Broken objects occur when the class for a pickled object cannot be
> > imported. To change the location of a class, you need to provide an
> > alias at the old location so that the object can be unpickled, i.e.
> > MyOldClassName = MyNewClassName. You can only remove MyOldClassName
> > after you have updated all of the pickles (with your code below).
>
> Note: We made a relatively good experience by removing those symbols
> from their original modules and provide a generation which first sets up
> dummies, then runs migration code to remove/rebase those objects and
> then remove the dummies again.
>
> That way you can get your source code clean of 'BBB' code in a single
> generation.

I used that method in ST as well a long time ago. Marius was involved as well, 
but he must have forgotten. :-)

Regards,
Stephan
-- 
Stephan Richter
Web Software Design, Development and Training
Google me. "Zope Stephan Richter"