[Zope-dev] To the brave folks trying Zope HEAD...

[Jeremy Hylton]

On Thu, 2003-12-11 at 15:15, Sidnei da Silva wrote:
> Do'h, that's a bit difficult since Jim removed them for good :( 

Hmmm... I suppose you could write the script in Zope 2.7 and tell people
they have to use that version of Zope to convert the database before
upgrading.

> Now, back to the automagically-converting idea, would it be possible
> to provide an alias for the old BTree package that would feed the old
> pickle into a new BTrees constructor on unpickling *wink*?

I just remembered why the problem is harder.  Any object that references
as BTree has the name of the BTree class embedded in its pickle.  The
conversion script needs to frob each of those database records to refer
to the new class.  I'm not sure how to do that.  Unpickle and repickle
each one?  A "simple" binary rewrite of the pickle to past in the new
name.  Just not sure.

Jeremy