get_transaction module rename

by Plone Documentation Team — last modified Dec 30, 2008 03:07 PM

Zope has changed their syntax for getting transactions, and it has been deprecated in the the previous Zope releases for a while now. Zope 2.10.x (which is what Plone 3.0 runs on) removes the old syntax, so you have to update your code accordingly. Here's how.

Typical error message::

NameError: global name 'get_transaction' is not defined

Just to show you a complete traceback of how this might look, here's the full thing as seen in a typical product install, where it is common to use subtransactions (for completeness and search engines)::

2007-04-12 23:12:01 ERROR Zope.SiteErrorLog http://localhost:8080/nu/portal_quickinstaller/installProducts
Traceback (innermost last):
Module Products.CMFQuickInstallerTool.QuickInstallerTool, line 381, in installProduct
- __traceback_info__: ('Poi',)
Module Products.ExternalMethod.ExternalMethod, line 231, in __call__
- __traceback_info__: ((<PloneSite at /nu>,), {'reinstall': False}, (False,))
Module /Users/limi/Projects/Plone/3.0/Products/Poi/Extensions/Install.py, line 65, in install
NameError: global name 'get_transaction' is not defined
/Users/limi/Projects/Plone/3.0/Products/CMFQuickInstallerTool/QuickInstallerTool.py:409:
DeprecationWarning: This will be removed in ZODB 3.7:
subtransactions are deprecated; use sp.rollback() instead of transaction.abort(1),
where `sp` is the corresponding savepoint captured earlier
transaction.abort(sub=True)

To update this, replace::

get_transaction().commit(1)

with::

transaction.commit(1)

(keep the '(1)' part if it already exists in the code, omit it otherwise)

You might have to add an 'import transaction' statement at the top of your file if you haven't imported it already.

For a live example, see the Install.py part of "Poi changeset 40594":http://dev.plone.org/collective/changeset/40594#file0.