#36764: QuerySet.only() causes n+1 queries with reverse foreign key relation
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Reporter: bernhard | Owner: (none)
Type: Bug | Status: new
Component: Database layer | Version: dev
(models, ORM) |
Severity: Normal | Resolution:
Keywords: queryset, only, | Triage Stage:
defered | Unreviewed
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 Clifford Gama):
FWIW, this works:
{{{#!python
def test_only_reverse_fk(self):
qs = self.s1.primary_set.only("name", "related_id")
with self.assertNumQueries(1):
for primary in qs:
primary.name
}}}
and so does `.values("name")`.
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Ticket URL: <https://code.djangoproject.com/ticket/36764#comment:1>
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