[Zope-dev] zope.dublincore and zope.copypastemove not compatible?

[Michael Howitz]

Am 19.08.2010 um 11:56 schrieb Michael Howitz:
> Am 06.02.2010 um 17:43 schrieb Michael Howitz:
>> Hi,
>> 
>> I found something strange in metadata when copying a persistent object.
>> 
>> My situation is the following:
>> I have a container with some elements inside. I create a copy of this container using
>> 
>> zope.copypastemove.ObjectCopier(my_container).copyTo(my_container.__parent__)
>> 
>> (Actually I use zope.copypastemove.interfaces.IObjectCopier(my_container) but this calls the adapter mentioned above.)
>> 
>> Side note: Is this the right way to copy an persistent object nowadays?
>> 
>> This happens tho dublin core metadata then:
>> As zope.dublincore.timeannotators.CreatedAnnotator is subscribed to zope.lifecycleevent.IObjectCreatedEvent it gets called as the ObjectCopiedEvent is a subclass of ObjectCreatedEvent. The copy of the container gets a new creation date set in its metadata.
>> 
>> But zope.copypastemove.dispatchToSublocations calls the subscribers for the sublocations using 
>> zope.component.subscribers((sub, event), None)
>> 
>> So the zope.dublincore.timeannotators.CreatedAnnotator does not get called as it is not registered for (object, event) but only for (event,).
>> 
>> This leads to a strange situation: the metadata of the copied container get updated but not the metadata of its contents.
>> This behavior has not changed since version 3.4.0 which was about 2,5 years ago.
>> 
>> I think this is a long-standing bug and it should it be fixed in zope.dublincore by registering the subscribers for (object, event)? (Additionally or exclusively, I'm not sure.)
>> 
>> Any thoughts?
> 
> As there were no replies I this bug into launchpad: https://bugs.launchpad.net/zope.copypastemove/+bug/620353

I implemented a solution, see comment https://bugs.launchpad.net/zope.copypastemove/+bug/620353/comments/1

Could someone please review the solution before I merge it into trunk?
Thanks in advance.


Yours sincerely,
-- 
Michael Howitz · mh at gocept.com · software developer
gocept gmbh & co. kg · forsterstraße 29 · 06112 halle (saale) · germany
http://gocept.com · tel +49 345 1229889 8 · fax +49 345 1229889 1
Zope and Plone consulting and development