On Fri, Apr 06, 2007 at 12:53:06AM -0700, Douglas Douglas wrote: > Here's my class definition: > > class Variable(OOBTree, Contained): > > implements(IVariable, IAttributeAnnotatable) > > name = None > units = None > > I start the server and everything works like a charm. My AddForm works OK for > the Variable class. I checked its create() method (with assert statements) and > the returned instances contain the name and units attributes set from the > form. > > But if I stop the server and restart later, my data (datetimes and floats) are > still there, but my name and units attributes are None!!
OOBTree is at fault here. I'm sure that if you investigated it, you'd find a custom __getstate__. I suggest that you do not subclass OOBTree but instead contain it in an attribute and delegate all the methods. class Variable(Persistent, Contained): implements(...) def __init__(self): self.data = OOBTree() def __getitem__(self, key): return self.data[key] ... Marius Gedminas -- I dont know about madness (and anyway, the little green martians dancing around me tell me not to worry...), but I've implemented something not unlike this just now. -- Peter Sabaini
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