[Zope] ZODB Persistence problem

[Dieter Maurer]

Emiliano Marmonti wrote at 2003-9-18 21:48 -0300:
 > ...
 > Now I have a problem that have no idea how to fix it. Could
 > add objects into a ZODB separate database, could add the catalog and the
 > 
 > index, but when the database has one element, with every operation
 > (inclusive opening it) this message appears from Zope:
 > 
 > 'App.PersistentExtra' module has no attribute 'Autor'

You screwed up your ZODB...

I have no idea how you had been able to do that.

 > ...
 >     (Info: ('\x00\x00\x00\x00\x00\x00\x00\x0e',
 > '((U\x13App.PersistentExtraq\x01U\x05Autorq\x02tq\x03Nt.}q\x04(U\x02idq\x05U\x0822596451q\x06U\x04nameq\x07U\x0f
 > 
 > Juana Silviaq\x08U\robservacionesq\tU\x0bpruebaq\nu.'))
 >   File C:\Archivos de programa\Zope\lib\python\ZODB\DB.py, line 122, in
 > _classFa
 > ctory
 > AttributeError: 'App.PersistentExtra' module has no attribute 'Autor'

Somehow, you stored an object into the ZODB the class
of which was "App.PersistentExtra.Autor"

As the name suggests, there is no class "Autor" (seems not to be English)
in "App.PersistentExtra". When you try to load the object,
Zope does indeed not find it.


 > Simply, I have no idea what is happening, have searched over
 > App.PersistentExtra but...what is???? Somebody knows where could I find
 > an example (that works and is updated) for doing this kind of tasks?

The ZODB guide might help you.
Of course, it does not contain an example for precisely your task.

Moreover, zodb-dev at zope.org might be more adequate for your type
of questions.


 > My code is:
 > -----------------------------
 > ...
 > class Autor(Persistent):
 > ...

Somehow, you succeeded to let Python think this class were
defined in "App.PersistentExtra".

I have no idea how you could do that...


Dieter