#28838: annotations + base_manager_name + instance.save() raises exception
-------------------------------------+-------------------------------------
     Reporter:  James Addison        |                    Owner:  nobody
         Type:  Bug                  |                   Status:  new
    Component:  Database layer       |                  Version:  1.11
  (models, ORM)                      |
     Severity:  Normal               |               Resolution:
     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 James Addison):

 Adding this hack to the `Item` model addresses the issue for now. Yes, I
 realize this is overriding an undocumented, internal Django `Model` method
 and is thus fragile to future changes - but it's a hack that lets me
 proceed for now and hopefully helps the Django team.
 {{{
 class Item(models.Model):
     ....
     def _do_update(self, base_qs, *args, **kwargs):
         qs = base_qs.all()
         qs.query.annotations.clear()
         return super()._do_update(qs, *args, **kwargs)
 }}}

-- 
Ticket URL: <https://code.djangoproject.com/ticket/28838#comment:1>
Django <https://code.djangoproject.com/>
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