Basic Transmogrifier pipeline to migrate to Plone 5 Dexterity Types

gyst · September 30, 2016, 6:43am

On the topic of migrating Events, I found that the start and end dates on Event are python datetime.datetime, in contrast with the default DublinCore date fields which are zope DateTime.

I've developed a transmogrifier blueprint that fixes timezone errors when importing Events with transmogrifier. It's in a private package but here is the blueprint as a public gist:

gist.github.com

https://gist.github.com/gyst/c3739160a18cf52c93e0132da511b2ee

pytzfixer.py

# coding=utf-8
from zope.interface import classProvides, implements
from collective.transmogrifier.interfaces import ISectionBlueprint
from collective.transmogrifier.interfaces import ISection
from collective.transmogrifier.utils import Matcher, Condition

import logging
logger = logging.getLogger(__name__)

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pytzfixer.rst

Pytz timezone fixer section
===========================

This fixes the dreadful ``UnknownTimeZoneError: (UnknownTimeZoneError('GMT+1',)``
thrown by ``transmogrify.dexterity.schemaupdater`` when writing Event dates.
It turns out pytz does not recognize a timezone like ``GMT+1``.
This should be ``Etc/GMT+1``. This blueprint fixes that::

  [pytzfixer]
  blueprint = quaive.transmogrifier.sections.pytz.fixer

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