[Grok-dev] Pickling an object stored in the Zodb. How do I skip the __parent__ attribute?

Sebastian Ware sebastian at urbantalk.se
Thu Aug 14 10:13:17 EDT 2008

Thanks for the pointer! I have read:


And found that the pickling is done by calling the method you refered  


and that it really does exist on the objects in the Zodb. I will  
override the method by means of an adapter for the root object that I  
am pickling and remove the attribute [__parent__]. Feels as though  
this might actually work :)

Mvh Sebastian

14 aug 2008 kl. 15.11 skrev Jegenye 2001 Bt (Miklós Prisznyák):

> 2008/8/14 Sebastian Ware <sebastian at urbantalk.se>
> I am trying to export and import objects from the Zodb using
> cPickle.dumps().
> My problem is that the pickler traverses the __parent__ attribute thus
> returning a much larger object graph than I wish to serialize.
> Do I have to subclass the pickler or is there som other smart way of
> making it skip the __parent__ attribute?
> You could  write an adapter  (or modify the class of the content  
> objects itself) to use __setstate__ and __getstate__ , etc:
> http://www.python.org/doc/2.5/lib/node321.html
> -- 
> Best regards,
>    Miklós
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