#25361: Unpickling of QuerySet fails in presence of abstract intermediate model
     Reporter:  Torsten Bronger      |                    Owner:  nobody
         Type:  Bug                  |                   Status:  new
    Component:  Database layer       |                  Version:  1.8
  (models, ORM)                      |
     Severity:  Normal               |               Resolution:
     Keywords:                       |             Triage Stage:  Accepted
    Has patch:  0                    |      Needs documentation:  0
  Needs tests:  0                    |  Patch needs improvement:  0
Easy pickings:  0                    |                    UI/UX:  0

Comment (by Samuel Spencer):

 I just got bit by this and I can't say I've come across the best solution,
 but I was able to resolve it with this code in

 --- __init__.py 2016-09-22 06:07:36.167725186 +0000
 +++ __init__.py.old     2016-09-22 06:08:19.175742789 +0000
 @@ -66,11 +66,6 @@
      return apps.get_model(app_label,

 -def _load_field_for_abstract(app_label, model_name, field_name):
 -    from django.utils.module_loading import import_string
 -    return import_string('%s.models.%s'%(app_label,
  # A guide to Field parameters:
  #   * name:      The name of the field specified in the model.
 @@ -508,11 +503,7 @@
              # Deferred model will not be found from the app registry.
              # could be fixed by reconstructing the deferred model on
              raise RuntimeError("Fields of deferred models can't be
 -        if self.model._meta.abstract:
 -            func = _load_field_for_abstract
 -        else:
 -            func = _load_field
 -        return func, (self.model._meta.app_label,
 +        return _load_field, (self.model._meta.app_label,

      def get_pk_value_on_save(self, instance):

 {{{__init__.py.old}}} is the original from Django 1.8.14. I'm not sure
 where to begin with submitting and testing this, but I'd like to help if
 someone could give me some pointers.

Ticket URL: <https://code.djangoproject.com/ticket/25361#comment:2>
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