Advanced tips for upgrading Plone.
Some of the information on this page is for Plone 4, which used the Archetypes content type framework. Plone 5.x uses the Dexterity content type framework.
This guide contains some tips for Plone upgrades. For more information, see also the official Plone upgrade guide
Test the upgrade on your local development computer first.
Create two buildouts: one for the old Plone version (your existing buildout) and one for the new version.
Prepare the migration in the old buildout. After all preparations are done, copy the Data.fs and blobstorage to the new buildout and run plone_migration tool there.
Fix persistent utilities¶
You might need to clean up some leftovers from uninstalled add-ons which have not cleanly uninstalled.
Use this utility:
Perform this against old buildout
Migration from non-folderish to folderish Archetypes based content types¶
Non-folderish content types are missing some BTree attributes, which folderish
content types have (See
plone.app.folder provides an upgrade view to migrate pre-plone.app.folder (or
non-folderish) types to the new BTree based implementation (defined in:
To upgrade your non-folderish content types to folderish ones, just call
@@migrate-btrees on your Plone site root, and you’re done.
This applies to Archetypes based content types.
Make sure that your site them works on Plone 4. Official upgrade guide has tips how the theme codebase should be upgraded.
Theme fixing and portal_skins¶
Your theme might be messed up after upgrade.
Try playing around setting in portal_skins Properties tab. You can enable, disable and reorder skins layer applied in the theme.
Upgrade may change the default theme and you might want to restore custom theme in portal_skins.
Upgrade tips for plone.app.discussion¶
Enabling plone.app.discussion after Plone 4.1 upgrade¶
After migration from an earlier version of Plone, you will may notice that you
do not have a Discussion control panel for
plone.app.discussion, the new
commenting infrastructure which now ships as part of new Plone installs beyond
version 4.1. If a check of your Site Setup page reveals that you do not have
the Discussion control panel, implement the following.
Install plone.app.discussion manually¶
Log into your Plone site as a user with Manager access
Browse to the following URL to manually install
In the Select Profile or Snapshot drop-down menu, select
Import all stepsbutton at the bottom of the page.
Confirm that Discussion is now present as a control panel in your Site Setup
Migrate existing comments¶
Follow the instructions regarding How to migrate comments to plone.app.discussion to migrate existing Plone comments.
Fixing Creator details on existing comments¶
You may notice that some of your site’s comments have the user’s ID as their
Creator property. At time of writing (for
the Creator field should refer to the user’s full name and not their user ID.
You’ll likely notice that a number of other fields, including
author_email are not present on
some of your migrated comments. Reasons why comments get migrated but
unsuccessfully are being investigated.
This may change for future versions of
plone.app.discussion. For now,
though, having the user ID left as the Creator is less than helpful and means
aspects like the username, name, and email not present affect usability of
If a site has many comments with this issue, it is possible to step through all of them and correct them. Using a script like the following will process each of the affected comments accordingly:
from Products.CMFPlone.utils import getToolByName from zope.app.component import hooks from plone import api context = hooks.getSite() catalog = api.portal.get_tool(name='portal_catalog') mtool = api.portal.get_tool(name='portal_membership') brains = catalog.searchResults(object_provides='plone.app.discussion.interfaces.IComment') for brain in brains: member = api.user.get(username=brain.Creator') comment = brain.getObject() if member and not comment.author_username and not comment.author_name and not comment.author_email: fullname = member.getProperty('fullname') email = member.getProperty('email') if fullname and email: comment.author_username = brain.Creator #our borked user ID comment.creator = fullname comment.author_name = fullname comment.author_email = email comment.reindexObject() print 'Fixed and reindexed %s' % comment else: print 'Could not find properties for author of %s' % comment
This can be run anywhere an Acquisition
context object is available, such
as running your Zope instance in
debug mode, an ipython prompt, or some
other function on the filesystem. The
getSite() function call can (and may
need to) be replaced with some other pre-existing context object if that is
Keep in mind that this script was successfully used in a situation where no
possible collisions existed between correctly-migrated comments Creators’ full
names and user IDs (the code looks up the Creator in the hope of finding a
valid Plone member). If you had a situation where you had some correctly
migrated comments written by a user with ID
david and full name of
Administrator, and also had a user with the ID of
this script may not be suitable. In the test situation, the three attributes
author_email were observed as
None, so in checking for this too, this may avoid problems. Test
the code first with something like a