[ZODB-Dev] Adopting ZODB

[Christian Theune]

Chris S wrote:
> I'm trying to adopt some code to use ZODB as its persistence level.
> I've read the "Writing a Persistent Class" article
> (http://www.zope.org/Wikis/ZODB/FrontPage/guide/node3.html#SECTION000350000000000000000) 
> 
> but how do you persist a class that already inherits another class?
> Does ZODB work with multiple inheritence? 

Yes.

> Also, how should I persist
> objects in libraries beyond my control? For example, I'd like to
> persist instances of pyrobot.brain.conx.Network
> (http://pyrorobotics.org/?page=Building_20Neural_20Networks_20using_20Conx). 
> 
> Is there any ability in ZODB to retroactively wrap objects in a
> persistence mechanism instead of having to rewrite an entire library
> to use the Persistent class?

You can always persist (almost) any object, even if it does not subclass 
from Persistent. However, any changes to the object will not be detected 
automatically and you would have to either a) reassign the object to the 
ZODB or b) mark it as changed using _p_changed()

Christian

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