#29229: QuerySet.values_list() combined with .extra() or .annotate() may produce
wrong .union()
-------------------------------------+-------------------------------------
Reporter: master | Owner: nobody
Type: Bug | Status: closed
Component: Database layer | Version: 1.11
(models, ORM) |
Severity: Release blocker | Resolution: fixed
Keywords: union values_list | Triage Stage: Ready for
| checkin
Has patch: 1 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
-------------------------------------+-------------------------------------
Comment (by master):
The regression test added by the PR
(test_union_with_two_annotated_values_list()) seems to have an
unnecessarily complex combination, just to comply with a mandatory
ordering of fields imposed by the union.
Instead of:
{{{
.annotate(count=F('num'),).annotate(num=Value(1, IntegerField()),
}}}
This writing is more understandable:
{{{
.annotate(num=F('num'),).annotate(count=Value(1, IntegerField()),
}}}
--
Ticket URL: <https://code.djangoproject.com/ticket/29229#comment:8>
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