#28621: Crash in QuerySet.annotate() with OuterRef
-------------------------------------+-------------------------------------
Reporter: Дилян Палаузов | Owner: nobody
Type: Bug | Status: new
Component: Database layer | Version: 1.11
(models, ORM) |
Severity: Normal | Resolution:
Keywords: QuerySet.extra | 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 Filip Kilibarda):
Replying to [comment:6 Ben Davis]:
> I am also getting this error. Is there a workaround?
>
> `AttributeError: 'ResolvedOuterRef' object has no attribute
'contains_aggregate'`
>
> My query looks like this:
> {{{#!python
> class ProgramQuerySet(models.QuerySet):
> def with_remaining_volunteers_needed(self):
> sessions_query = (
> Session.objects
> .filter(program=OuterRef('id'))
> .annotate(needed=OuterRef('volunteers_per_session') -
Count('volunteer_attendances'))
> .order_by('-needed')
> .values('needed')[:1]
> )
>
> return self.annotate(
> volunteers_per_session=(F('num_student_seats') *
F('student_volunteer_ratio')),
> needed=Subquery(sessions_query,
output_field=models.IntegerField())
> )
> }}}
I'm having exactly the same issue. Have you found a workaround for this?
--
Ticket URL: <https://code.djangoproject.com/ticket/28621#comment:7>
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