Updating Objects in ZODB Was: [Zope] Zope (X)3 FAQ

[Lennart Regebro]

Thomas Guettler wrote:
> I think it is enough to agree on a method name, no need to create an
> Interface.

Behaviour must also be agreed upon. For example:
- return 0 if no upgrade needed
- return 1 of upgrade succeeded
- raise an exception if upgrade failed

Otherwise you won't know how to behave with the function.
Other than that there isn't much interfacing to do. :) Well, it could be
nice to agree on the attribute for object version info too.