[Setup] Re: Problem upgrading from 2.14 to 2.53: KeyError: _Real
nd51 at leicester.ac.uk
Thu Jul 26 11:19:11 UTC 2007
Dan Thomas wrote:
> I have tried repeatedly to upgrade a Plone site (2.14, Zope 2.87, Python 2.35,
> Windows XP) to Plone 2.52 or 2.53 running in a completely separate Zope
> installation, by dropping in Data.fs.
> After migration attempt I get the error KeyError: '_real' (see traceback below).
> It also appears in the ZMI left-hand column!
> Do I need to "clean" the Data.fs somehow?
> Thanks for any help.
Not sure when you mean this happened- during, or after, migration
attempt. If the migration itself failed, all bets are off about what
will get served when attempting to look at the site AFTER that.
To make progress here's some ideas:
Before attempting portal_migration, make sure nothing is broken in ZMI.
Are all 3rd-party products in the new site compatible with Plone 2.5.3?
Get the new versions if required, before attempting migration.
Before attempting portal_migration make sure you don't have "rogue
customisations" floating around. Any customised versions of old versions
of templates,scripts etc can cause problems, so you have to compare
everything you've customised and re-apply customisations where
necessary. This kind of audit is essential when migrating.
As for "cleaning the Data.fs", well you could first do a catalog clear
and rebuild from ZMI->portal_catalog->Advanced. This wouldn't hurt, and
while it takes a while to run, helps in certain circumstances.
Web Application Developer
University of Leicester
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