#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:  Accepted
    Has patch:  0                    |      Needs documentation:  0
  Needs tests:  0                    |  Patch needs improvement:  0
Easy pickings:  0                    |                    UI/UX:  0
-------------------------------------+-------------------------------------

Comment (by charettes):

 Replying to [comment:5 MatthewWilkes]:
 > I don't believe that IsNull lookups should be converting their values to
 the type of the parent field, however the RelatedLookupMixin has useful
 looking code for ensuring that MultiColSource is handled correctly.
 >
 > Would the fix for this be as simple as:
 >
 > {{{
 > class RelatedIsNull(RelatedLookupMixin, IsNull):
 >     def get_prep_lookup(self):
 >         return self.rhs
 > }}}
 > ?

 `return super(RelatedLookupMixin, self).get_prep_lookup()` would be more
 appropriate.

--
Ticket URL: <https://code.djangoproject.com/ticket/26983#comment:6>
Django <https://code.djangoproject.com/>
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