#25544: prefetch_related sends duplicate ids to database
-------------------------------------+-------------------------------------
Reporter: spectras | Owner: Ian-Foote
Type: | Status: assigned
Cleanup/optimization |
Component: Database layer | Version: 1.8
(models, ORM) |
Severity: Normal | Resolution:
Keywords: prefetch duplicate | Triage Stage: Accepted
Has patch: 1 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 1
Easy pickings: 0 | UI/UX: 0
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Comment (by carljm):
@IanFoote Oops, my fault. I didn't consider the possibility that non-
hashable values (e.g. lists for an ArrayField) could be passed to `__in`
lookups. I don't really see a way to preserve this fix in the face of that
possibility (going through the value and trying to convert everything to
something hashable doesn't seem like a good plan), so unless you have any
ideas I'm not seeing, I think we may need to revert to your previous fix
at the `prefetch_related` layer.
Sorry for the bad direction!
--
Ticket URL: <https://code.djangoproject.com/ticket/25544#comment:5>
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