Grant, Jeffrey,
Tonight it occurred to Grant and I that we were needlessly indexing and
reindexing pure occurrences in the master indexes Bryan creates on the
ContentItem kind collection for the dashboard.
From what I could gather, the definition of a pure occurrence is a
ContentItem instance that has a non None value for 'occurrenceFor' and a None
value for 'modificationFor'.
Assuming that is correct, I changed the contentItems collection to be a
FilteredCollection based on the ContentItem KindCollection and, once I got it
right, was surprised to see that it made little or no difference in my import
case.
Digging a little further, I see that *all* occurrences created when importing
an .ics file or restoring cosmo collections are impure, they all have a non
None value for 'modificationFor'. The only time I was able to create pure
occurrences was by scrolling the calendar back and forth by some weeks.
Is it expected that all imported occurrences have a 'modificationFor' value ?
Andi..
ps: still, making this change does improve performance of operations involving
pure occurrences as these are no longer indexed and reindexed.
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