#31135: OuterRef generates invalid SQL with __in filter.
-------------------------------------+-------------------------------------
     Reporter:  Bernd Wechner        |                    Owner:  nobody
         Type:  Bug                  |                   Status:  closed
    Component:  Database layer       |                  Version:  3.0
  (models, ORM)                      |
     Severity:  Normal               |               Resolution:  invalid
     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 Mariusz Felisiak):

 > It remains a bug that it produces invalid SQL where a prior version did
 not, ...

 Yes but unintentionally and only on some databases.

 > and not a sensible exception - causing much wasted time on the part of
 anyone who used the old

 Feel-free to prepare a patch with raising a Python level error when using
 many-to-many field in `F()` or `OuterRef()` (see also #32414). I would be
 happy to review.

-- 
Ticket URL: <https://code.djangoproject.com/ticket/31135#comment:7>
Django <https://code.djangoproject.com/>
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