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--- python:grok_and_zope.app.undo [2012/09/12 14:01] – angelegt jenad
+++ python:grok_and_zope.app.undo [2017/11/15 09:09] (aktuell) – gelöscht jenad
@@ Zeile 1: / Zeile 1: @@
-What: undo transactions in grok
-Problem: zope.app.undo does not work with ZODB-3.10 and grok-1.10.3
-Solutions (all these are workarounds, use them at your own risk):
-. MenuItem Error
-as result of adding zope.app.undo to setup.py following error appears:
-  ConfigurationError: ('Unknown directive', u'http://namespaces.zope.org/browser', u'menuItem')
-edit
-  zope.app.undo-3.5.0-py2.7.egg/zope/app/undo/configure.zcml
-and delete the menuItem-Sections; menuItem is used bei ZMI and implemented bei zc.forms or other but not by zope.formlib; I use zope.formlib in grok apps
-. ZODB has changed the api
-Error after submit the transaction ID's:
-  "Duplicate tpc_begin calls for same transaction"
-The undo API has changed with ZODB 3.10. As noted in the changelog:
-        "The API for undoing multiple transactions has changed. To undo
-        multiple transactions in a single transaction, pass a list of
-        transaction identifiers to a database's undoMultiple method. Calling a
-        database's undo method multiple times in the same transaction now
-        raises an exception."
-        Your code calls undo multiple times, and needs to be changed accordingly.
-edit in
-  zope.app.undo-3.5.0-py2.7.egg/zope/app/undo/__init__.py
-the last def:
-old:
-<code python>
-    def _undo(self, ids):
-        for id in ids:
-            self.__db.undo(id)
-        transaction.get().setExtendedInfo('undo', True)
-</code>
-new:
-<code python>
-    def _undo(self, ids):
-        self.__db.undoMultiple(ids)
-        transaction.get().setExtendedInfo('undo', True)
-</code>