#33282: django.db.utils.ProgrammingError: more than one row returned by a
subquery
used as an expression
-------------------------------------+-------------------------------------
Reporter: Antonio Terceiro | Owner: nobody
Type: Bug | Status: new
Component: Database layer | Version: 3.2
(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 Antonio Terceiro):
Bisecting points to the same culprit as #32690:
{{{
35431298226165986ad07e91f9d3aca721ff38ec is the first bad commit
commit 35431298226165986ad07e91f9d3aca721ff38ec
Author: Simon Charette <[email protected]>
Date: Wed Mar 6 01:05:55 2019 -0500
Refs #27149 -- Moved subquery expression resolving to Query.
This makes Subquery a thin wrapper over Query and makes sure it
respects
the Expression source expression API by accepting the same number of
expressions as it returns. Refs #30188.
It also makes OuterRef usable in Query without Subquery wrapping. This
should allow Query's internals to more easily perform subquery push
downs
during split_exclude(). Refs #21703.
django/db/models/expressions.py | 64
+++++++----------------------------------
django/db/models/sql/query.py | 28 ++++++++++++++++--
django/db/models/sql/where.py | 15 ++++++++++
tests/queries/tests.py | 2 +-
4 files changed, 52 insertions(+), 57 deletions(-)
bisect run success
}}}
--
Ticket URL: <https://code.djangoproject.com/ticket/33282#comment:1>
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