#29932: Queryset `difference()` after `intersection()` returns wrong queryset on
SQLite
-------------------------------------+-------------------------------------
Reporter: | Owner: nobody
michaeldel |
Type: Bug | Status: new
Component: Database | Version: 2.1
layer (models, ORM) | Keywords: queryset sqlite
Severity: Normal | difference intersection
Triage Stage: | Has patch: 0
Unreviewed |
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
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Considering a simple model
{{{
from django.db import models
class Foo(models.Model):
pass
}}}
Here is the minimal way to encounter this issue
{{{
Foo.objects.create(pk=1)
Foo.objects.create(pk=2)
a = Foo.objects.all()
b = Foo.objects.intersection(Foo.objects.filter(pk=1))
assert a.count() == 2
assert b.count() == 1
diff = a.difference(b)
assert diff.exists() == 1 # fails with SQLite!
}}}
This operation however works as expected on PostgreSQL.
--
Ticket URL: <https://code.djangoproject.com/ticket/29932>
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