#34449: ProgrammingError: non-integer constant in GROUP BY with Case When and
annotate Count
-------------------------------------+-------------------------------------
     Reporter:  Guillaume LEBRETON   |                    Owner:  nobody
         Type:  Bug                  |                   Status:  new
    Component:  Database layer       |                  Version:  4.1
  (models, ORM)                      |
     Severity:  Normal               |               Resolution:
     Keywords:                       |             Triage Stage:
                                     |  Unreviewed
    Has patch:  0                    |      Needs documentation:  0
  Needs tests:  0                    |  Patch needs improvement:  0
Easy pickings:  0                    |                    UI/UX:  0
-------------------------------------+-------------------------------------

Comment (by David Sanders):

 Hi, thanks for the report but I can't reproduce this on latest main or 4.1
 using the example supplied. Inspecting the queryset shows that Django is
 correctly using the column number for the alarm annotation:

 {{{
 qs = Person.objects.all().annotate(number=Count("quantitativeattribute"))
 qs = qs.annotate(
     alarm=Case(
         When(id__in=[], then=Value("danger", output_field=CharField())),
         default=Value("warning"),
     )
 )
 qs = qs.values("pk", "number", "alarm")
 print(qs.query)
 }}}

 result:

 {{{
 SELECT "ticket_34449_person"."id",
 COUNT("ticket_34449_quantitativeattribute"."id") AS "number", warning AS
 "alarm" FROM "ticket_34449_person" LEFT OUTER JOIN
 "ticket_34449_quantitativeattribute" ON ("ticket_34449_person"."id" =
 "ticket_34449_quantitativeattribute"."person_id") GROUP BY
 "ticket_34449_person"."id", 3
 }}}

 Maybe double check the supplied example isn't leaving anything out? 🤔

-- 
Ticket URL: <https://code.djangoproject.com/ticket/34449#comment:1>
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