#14645: Exclude query with multiple conditions for the same multi-value relation
not correct
-------------------------------------+-------------------------------------
Reporter: Ben Buchwald | Owner: nobody
<bb2@…> |
Type: Bug | Status: new
Component: Database layer | Version: master
(models, ORM) |
Severity: Normal | Resolution:
Keywords: exclude manytomany | 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 akaariai):
I think it is time to start working on this. I think we have two major
bugs in Django ORM:
1. This one.
2. Aggregation over multiple different multivalued relations, or
aggregation after filtering over m2m relation produces wrong results.
In addition, we have the problem that filtering over multivalued relation
doesn't use a subquery, instead you have to use distinct.
These all are mixed together. Unfortunately this isn't easy to fix. But
that doesn't mean we shouldn't try.
--
Ticket URL: <https://code.djangoproject.com/ticket/14645#comment:17>
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