[Zope-dev] nasty persistence problem

[Chris Withers]

Michel Pelletier wrote:
> 
> Tim McLaughlin wrote:
> >
> > Thanks Chris, I'll hold on to that for a rainier day.  I just worked
> > this one out in a very roundabout way ;)
> >
> > A product had gotten copied in that moved a Product class from one
> > module to another even though everything else was the same.  It seems
> > that ZODB doesn't like that.
> 
> It sure doesn't.  When it pickles an object, it says, here's a big
> binary blob that is the state of the object.  The code for the object
> can be found in Products.MyProduct.MyModule.MyClass.  When you move the
> code, ZODB understandably barfs.

Shane's latest atch help here:
http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/zodbex/zodbex/

- ChangeModules will let you change the module and name of persisted 
class instances.  This could be very beneficial when you have to change 
the name of a product.

cheers,

Chris