[Zope3-Users] Re: Problems with ZDC upgrading to Zope 3.3.0b1
Stephan Richter wrote: On Thursday 11 May 2006 03:44, Tom Dossis wrote: Is there a migration operation I need to run? Clicking evolve: http://localhost:8080/++etc++process/@@generations.html doesn't seem to do the trick. It seems to me that no generation scripts were written. :-( This is a real show-stopper! I will not make another Zope 3.3 release before this is fixed. On the other hand, it seems that the BBB packages that would guarantee the pickle to be loaded were not included in the release (http://www.zope.org/Collectors/Zope3-dev/603). And yes, no generation scripts were written. Why? Because a) there doesn't (yet) seem to be an API that lets you iterate over objects (perferrably of a certain class) in the ZODB so that you could have them repickled (at least that's what Jim told me when I asked him) b) no persistent class was moved for this reason. Of course, non-persistent classes might still have been pickled. However, IIRC even if we had such an API described in a), it wouldn't be of any use because the objects that were moved don't have their own pickle but live in the pickle of some persistent object that makes a reference to it. As said, BBB packages were provided, but not included in the release. This is a packaging problem. Philipp ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
Re: [Zope3-Users] Re: Problems with ZDC upgrading to Zope 3.3.0b1
On Thursday 11 May 2006 10:06, Philipp von Weitershausen wrote: On the other hand, it seems that the BBB packages that would guarantee the pickle to be loaded were not included in the release (http://www.zope.org/Collectors/Zope3-dev/603). This is not enough. You are required to provide BBB *and* generation scripts for objects that are referenced in the ZODB And yes, no generation scripts were written. Why? Because a) there doesn't (yet) seem to be an API that lets you iterate over objects (perferrably of a certain class) in the ZODB so that you could have them repickled (at least that's what Jim told me when I asked him) b) no persistent class was moved for this reason. Of course, non-persistent classes might still have been pickled. However, IIRC even if we had such an API described in a), it wouldn't be of any use because the objects that were moved don't have their own pickle but live in the pickle of some persistent object that makes a reference to it. As said, BBB packages were provided, but not included in the release. This is a packaging problem. -- Stephan Richter CBU Physics Chemistry (B.S.) / Tufts Physics (Ph.D. student) Web2k - Web Software Design, Development and Training ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
[Zope3-Users] Re: Problems with ZDC upgrading to Zope 3.3.0b1
On Thursday 11 May 2006 10:06, Philipp von Weitershausen wrote: On the other hand, it seems that the BBB packages that would guarantee the pickle to be loaded were not included in the release (http://www.zope.org/Collectors/Zope3-dev/603). This is not enough. You are required to provide BBB *and* generation scripts for objects that are referenced in the ZODB. Once the BBB references are removed the database will not load anymore. And yes, no generation scripts were written. Why? Because a) there doesn't (yet) seem to be an API that lets you iterate over objects (perferrably of a certain class) in the ZODB so that you could have them repickled (at least that's what Jim told me when I asked him) This is a problem, not a reason not to do it. At least for FileStorage, which most people use I assume, there is a way. Here is a good example of its use: http://source.schooltool.org/viewcvs/trunk/schooltool/src/schooltool/generations/evolve5.py?rev=5669view=auto b) no persistent class was moved for this reason. Of course, non-persistent classes might still have been pickled. However, IIRC even if we had such an API described in a), it wouldn't be of any use because the objects that were moved don't have their own pickle but live in the pickle of some persistent object that makes a reference to it. This is not true. See http://svn.zope.org/Zope3/trunk/src/zope/dublincore/annotatableadapter.py?rev=67630view=auto class ZDCAnnotationData(PersistentDict): Data for a Dublin Core annotation. A specialized class is used to allow an alternate fssync serialization to be registered. See the zope.dublincore.fssync package. As said, BBB packages were provided, but not included in the release. This is a packaging problem. Right, this is fixable. I am not too concerned about that. Regards, Stephan -- Stephan Richter CBU Physics Chemistry (B.S.) / Tufts Physics (Ph.D. student) Web2k - Web Software Design, Development and Training ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
Re: [Zope3-Users] Re: Problems with ZDC upgrading to Zope 3.3.0b1
Stephan Richter wrote: On Thursday 11 May 2006 10:06, Philipp von Weitershausen wrote: On the other hand, it seems that the BBB packages that would guarantee the pickle to be loaded were not included in the release (http://www.zope.org/Collectors/Zope3-dev/603). This is not enough. You are required to provide BBB *and* generation scripts for objects that are referenced in the ZODB If you tell me how to do it, I'll be happy to. As said, I asked Jim before and he just said that the object-iteration APIs of ZODB weren't yet plumbed through. I'll also state again that NO persistent class was moved. I'm therefore not sure if the object-iteration APIs would even help with this problem as they might only return persistent objects, not arbitrary references to non-persistent objects. And yes, no generation scripts were written. Why? Because a) there doesn't (yet) seem to be an API that lets you iterate over objects (perferrably of a certain class) in the ZODB so that you could have them repickled (at least that's what Jim told me when I asked him) b) no persistent class was moved for this reason. Of course, non-persistent classes might still have been pickled. However, IIRC even if we had such an API described in a), it wouldn't be of any use because the objects that were moved don't have their own pickle but live in the pickle of some persistent object that makes a reference to it. As said, BBB packages were provided, but not included in the release. This is a packaging problem. ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
Re: [Zope3-Users] Re: Problems with ZDC upgrading to Zope 3.3.0b1
Philipp von Weitershausen wrote: Stephan Richter wrote: On Thursday 11 May 2006 10:06, Philipp von Weitershausen wrote: On the other hand, it seems that the BBB packages that would guarantee the pickle to be loaded were not included in the release (http://www.zope.org/Collectors/Zope3-dev/603). This is not enough. You are required to provide BBB *and* generation scripts for objects that are referenced in the ZODB If you tell me how to do it, I'll be happy to. As said, I asked Jim before and he just said that the object-iteration APIs of ZODB weren't yet plumbed through. I'll also state again that NO persistent class was moved. I take that back :). There seems to be at least one persistent class. I was looking at the wrong file before. Philipp ___ Zope3-users mailing list Zope3-users@zope.org http://mail.zope.org/mailman/listinfo/zope3-users
