#24385: Sum() doesn't seem to respect .distinct() in the queryset filter before
.aggregate() when filtering by m2m.
-------------------------------------+-------------------------------------
Reporter: mcagl | Owner: nobody
Type: Bug | Status: new
Component: Database layer | Version: 1.7
(models, ORM) |
Severity: Normal | Resolution:
Keywords: | Triage Stage: Accepted
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Comment (by camillobruni):
http://www.sqlteam.com/article/how-to-use-group-by-with-distinct-
aggregates-and-derived-tables describes this issue on SQL-level. Their
solution was to use a derived table, something that is not directly
possible with django queries, I think. The only solution I came up with
was to sum up the values in a python loop, relying on `distinct()` to
properly do its job.
--
Ticket URL: <https://code.djangoproject.com/ticket/24385#comment:5>
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