Hi,
I have been fighting all day to understand a bug with the unregistration
of a utility from a local site.
After unregistration, some instance is left in the _subscribers list of
the utilities AdapterRegistry in my local site.
This avoids me to remove the code as it does leave a broken object.
I have come to the conclusion that the code that first registered the
utility is the culprit : the utility itself is not persistent.
It seems that the utility instance is unserialized at least two times
during unregistration, which leads (if I understand well) to two
different objects in memory.
This breaks the unsubscription algorithm that is based on object identity.
I naively tried to introduce the Persistent base class into the utility
calss. When I try to access the utility instance again, I get the error
mentioned in the subject of this mail :
TypeError: ('object.__new__(SyncedLanguages) is not safe, use
Persistence.Persistent.__new__()', <function _reconstructor at
0x1004297d0>, (<class
'Products.LinguaPlone.vocabulary.SyncedLanguages'>, <type 'object'>, None))
If I understand well, the a posteriori introduction of Persistent cannot
happen alone.
Can anyone tell me what I should do add to the class I try to make it
actually persistent ?
PS: It is late here, I hope I have not told too many silly things
--
Godefroid Chapelle (aka __gotcha) http://bubblenet.be
_______________________________________________
For more information about ZODB, see the ZODB Wiki:
http://www.zope.org/Wikis/ZODB/
ZODB-Dev mailing list - ZODB-Dev@zope.org
https://mail.zope.org/mailman/listinfo/zodb-dev
