=?iso-8859-1?Q?Max=5FM=F8ller=5FRasmussen?= writes:
From: Andy [mailto:andy@agmweb.ca]
We separate dev staging and production totally by having totally different Zopes, only putting new versions live once tested (in theory :).
Well yes ... I do that too. But often I have a product up and running, and I have to make an updated product that is incompatible with the old one. What I wondered about is how to upgrade from version 1.0 to 1.1 of the same products as easy as possible. The main problem should be members the new objects have while the old do not.
There are two approaches, I know of: 1. define class variables as defaults for these new members class C: # new product new_member= None def method(self): if self.new_member is None: # may need to do something ... 2. instantiate the new instance variables in the "__getstate__" method. I expect a HowTo on zope.org for these questions. Dieter