[Zope] - What constitutes a transaction?

[Paul Everitt]

Ty wrote:
> and restart it, these changes are still there. My added methods have
> effect that is forgotten at shutdown, and they don't show up 
> in the Undo
> list. I have another Product where my added methods do work correctly.

If the things that you change aren't Persistent, then the transaction
manager isn't notified that state has changed.  For instance, if you're
method changes an attribute that is a standard Python dictionary, then
the transaction manager doesn't see it.

--Paul