#31936: On MySQL, Oracle, and SQLite, __in lookup doesn't work on key 
transforms.
-------------------------------------+-------------------------------------
     Reporter:  Sébastien Pattyn     |                    Owner:  felixxm
         Type:  Bug                  |                   Status:  assigned
    Component:  Database layer       |                  Version:  3.1
  (models, ORM)                      |
     Severity:  Release blocker      |               Resolution:
     Keywords:  JSONField SQLite     |             Triage Stage:  Accepted
  MySQL                              |
    Has patch:  0                    |      Needs documentation:  0
  Needs tests:  0                    |  Patch needs improvement:  0
Easy pickings:  0                    |                    UI/UX:  0
-------------------------------------+-------------------------------------

Comment (by sage):

 `django-mysql` [https://github.com/adamchainz/django-
 mysql/blob/master/src/django_mysql/models/lookups.py#L89-L97 customizes
 the __in] lookup by [https://github.com/adamchainz/django-
 mysql/blob/master/src/django_mysql/models/functions.py#L276-L282 encoding
 the rhs and CAST-ing it to JSON]. I think it won't work on MariaDB though,
 because we can't do casting to JSON. There may be other ways to do it, but
 I haven't got an idea. Same with SQLite and Oracle.

-- 
Ticket URL: <https://code.djangoproject.com/ticket/31936#comment:6>
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