#24833: Annotation with `Case` can't be used with `exclude`
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Reporter: coolRR | Owner: nobody
Type: Bug | Status: new
Component: Database layer (models, ORM) | Version: 1.8
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 0 | UI/UX: 0
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n use `.filter` on it but you can't use `.exclude`. (You get various
exceptions about `.null` and `.get_col` not existing.)
Example:
{{{
def my_view(request, *args, **kwargs):
things = models.Thing.objects.all().annotate(
bar=django.db.models.Case(
django.db.models.When(
foo='foo',
then=django.db.models.Value('bar')
),
default=django.db.models.Value('baz'),
output_field=django.db.models.CharField()
)
)
print(things.filter(bar='bar')) # This one works
print(things.exclude(bar='bar')) # This one doesn't
return django.http.HttpResponse(str(things))
}}}
Full working example attached to this ticket. (Simply run `migrate`, then
`runserver`, then access the root URL to see the Django debug page for the
exception.)
--
Ticket URL: <https://code.djangoproject.com/ticket/24833>
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