-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Dieter Maurer wrote: > Andreas Jung wrote at 2006-1-28 09:04 +0100: > >> >>--On 27. Januar 2006 22:32:07 +0100 Dieter Maurer <[EMAIL PROTECTED]> >>wrote: >> >> >>>Andreas Jung wrote at 2006-1-27 07:04 +0100: >>> >>>>... >>>>Importing stuff from a new Zope version into an older Zope version was >>>>_never_ a supported feature. Only import between _identical_ versions. >>>>Anything else makes little sense and is unsupported. >>> >>>Of course, you might be happy when you can import into a newer Zope >>>version from an older one. At least, that makes some sense :-) >>> >> >>Of course we would be happy if we could do that. But export/import was >>never designed to deal with migration issue. > > > Export/import is essentially what the ZODB does all the time. > > If export/import does not work between given Zope versions, it is quite > likely that the same Zope versions will have difficulties with > storages exchange -- and this *IS* a migration issue, Zope should > be concerned with (and not the applications). > > If it does, export/import will simply follow (in most cases).
Agreed: for "forward-migration" of data, Zope has historically tried *very* hard to ensure that objects which had been created under an older version of Zope would be unpicklable under a newer version: we have treated the exceptions as serious bugs (where the problem was not due to third-party application code, anyway). However, the original poster wants to be able to import a .zexp file exported from a *newer* version of Zope into an *older* version. Keeping that path open has *not* been a goal for Zope, and so the OP needs to find another way to solve his problem. Tres. - -- =================================================================== Tres Seaver +1 202-558-7113 [EMAIL PROTECTED] Palladion Software "Excellence by Design" http://palladion.com -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFD2/hz+gerLs4ltQ4RAjcnAKC8wR36zfc8Q5X8PduwYnWYr26tOgCdE0ca GTQkMwmmhXM76Y67b3PBg7w= =s9Qh -----END PGP SIGNATURE----- _______________________________________________ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )