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

[Tim Peters]

[Jeremy]
> I think the attribute error on data is just a symptom of the BTree
> failure.  The object has no data attribute, because ZODB failed to
> unpickle the object that would be assigned to data.
>
> I don't know what happened with backwards compatibility for the old
> BTree classes.  When Jim and I discussed it a while back, I thought we
> concluded that we would provide a script that would convert all the
> old BTree instances to new BTrees instance.  But I don't know if that
> decision stuck or if the script was ever written.

Jim asked about it on zope-dev, and got no response; see:

    "Can we forsake database backward compatability on the head for
     a while?"

    http://mail.zope.org/pipermail/zope-dev/2003-November/021055.html

    ...

    > This would mean that old databases would not be useable with the
    > CVS head in the near term.  Would this cause anyone any problems?

    I'm happy no one responded to this. Silence is assent, :)