#26983: Boolean filter "field__isnull=False" not working with ForeignKey with
to_field
-------------------------------------+-------------------------------------
     Reporter:  weidwonder           |                    Owner:  nobody
         Type:  Bug                  |                   Status:  new
    Component:  Database layer       |                  Version:  1.10
  (models, ORM)                      |
     Severity:  Release blocker      |               Resolution:
     Keywords:  queryset             |             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 lamby):

 After writing a testcase (available here:
 https://gist.github.com/lamby/394b712e9e9ff1e868a20e67d4ba482b/raw) "git
 bisect" told me that it was indeed fixed with the above change.
 Investigating more, what happened was that I was applying the patch
 against `RelatedIn`instead of `RelatedLookupMixin`. Apologies for the
 noise there.

 ''However'', I am still correct in that the bug is not strictly `to_field`
 specific as it affects this `primary_key` case. Therefore, I suggest:

  * You update the release documentation, etc. to reflect this
  * You add my test (or similar) to prevent a regression

 In light of this, I am not resolving this ticket so that these action
 items do not get overlooked.

--
Ticket URL: <https://code.djangoproject.com/ticket/26983#comment:12>
Django <https://code.djangoproject.com/>
The Web framework for perfectionists with deadlines.

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