#31530: Check that CheckConstraint.check and UniqueConstraint.condition don't 
span
joins.
-------------------------------------+-------------------------------------
     Reporter:  Simon Charette       |                    Owner:  Hasan
         Type:                       |  Ramezani
  Cleanup/optimization               |                   Status:  assigned
    Component:  Database layer       |                  Version:  3.0
  (models, ORM)                      |
     Severity:  Normal               |               Resolution:
     Keywords:                       |             Triage Stage:  Accepted
    Has patch:  1                    |      Needs documentation:  0
  Needs tests:  0                    |  Patch needs improvement:  1
Easy pickings:  0                    |                    UI/UX:  0
-------------------------------------+-------------------------------------

Comment (by Hasan Ramezani):

 Here is my
 [https://github.com/django/django/pull/12953#discussion_r430551425 comment
 on PR]:

 Yes, this doesn't work for `Lower('parent__name')`. I can change the patch
 to cover this case as well but I don't know exactly which kind of
 expression should I cover? and with more cases, the code is going to be
 complicated.

 @felixxm Do you have any idea?

-- 
Ticket URL: <https://code.djangoproject.com/ticket/31530#comment:4>
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