[Zope] Error messages in startup after copying a Data.fs to a new zope version

[Dieter Maurer]

Jonas Nielsen wrote at 2007-1-12 11:18 +0100:
> ....
>I have ported a zope product running on zope 2.5.1 to zope 2.9. The 
>application works fine with no error messages in the log.
> ...
>   File "/usr/lib/zope2.9/lib/python/Products/ZCatalog/Catalog.py", line 
>383, in uncatalogObject
>     rid = uids.get(uid, None)
>AttributeError: get

It is possible that you catalogs are ancient? Even older than Zope 2.5.1?


Efficient mappings (such as those needed for the catalog
data structures) were implemented originally by "BTree" classes.
Later, "BTree" functionality was reimplemented and improved in
the "BTrees" package. In Zope 2.8, "BTree" support was dropped
(as Zope's base class "ExtensionClass" was rewritten as a new style
Python class and porting the old "BTree" package would have been
additional effort).


Apparently, you catalogs still use the old "BTree" package -- at least
this would give error messages such as the above.


If I am right and your are interested in keeping your catalog rather
than just rebuilding it in the new instance, then you would need
to migrate the old "BTree" objects into new "BTrees" objects
*IN THE OLD* instance. After that, you can move the storage.



-- 
Dieter