#32007: QuerySet.annotate() with WhereNode() crashes with AttributeError.
-------------------------------------+-------------------------------------
Reporter: Gordon Wrigley | Owner: nobody
Type: Bug | Status: new
Component: Database layer | Version: 3.1
(models, ORM) |
Severity: Release blocker | Resolution:
Keywords: | 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 Gordon Wrigley):
Here is a more useful variant, this is a type thing I actually do on a
regular basis, and I guess also means work won't be upgrading to 3.1 until
I find a work around.
{{{#!python
Question.objects.annotate(
pub_date__is_null=ExpressionWrapper(Q(pub_date=None),
output_field=BooleanField())
).values("pub_date__is_null").annotate(
id__count=Count("id", distinct=True)
).values("pub_date__is_null", "id__count")
}}}
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Ticket URL: <https://code.djangoproject.com/ticket/32007#comment:3>
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