Kai Diefenbach wrote:
Within an adapter I increase a counter (e.g. for every download of an
file) by doing: self.counter[0] += 1


self.counter is a PersistentList stored as annotation.

Note that if you use a PersistentList, then the entire list must be written to the database each time a non-Persistent element changes (or an item is added or removed from the list). If the list is of any appreciably size, that will be bad.
--
Benji York
Senior Software Engineer
Zope Corporation
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