[Zope-CMF] Re: Class attribute NOT persisting ????

[Maik Jablonski]

Jean-Francois.Doyon at CCRS.NRCan.gc.ca wrote:
>         def manage_references_edit(self, topicname, references):
>                 self.topicreferences[topicname] = references
> 
> Then of course more methods that actually make use of said attribute of
> interest "topicreferences"
> 
> My problem: The "topicreferences" attribute does NOT persist in the ZODB !!
> Every time I restart Zope, I loose the contents of that attribute! I checked
> an XML export of the tool instance, and the topicreferences dictionary is
> indeed there, but empty.

Please read the Zope-Developers-Guide before starting to develop 
Zope-products. The ZODB-Persistence-Machinery needs to be informed about 
your changes in a dictionary.

Something like

          def manage_references_edit(self, topicname, references):
                  self.topicreferences[topicname] = references
                  # Self-assigning informs the ZODB to make the
                  # whole object persistent
                  self.topicreferences = self.topicreferences

should do the trick.

-mj