#26977: Instantiating an abstract model with a string ForeignKey fails with
TypeError: isinstance() arg 2 must be a class, type, or tuple of classes
and types
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     Reporter:  Jonas Trappenberg     |                    Owner:  nobody
         Type:  Cleanup/optimization  |                   Status:  new
    Component:  Documentation         |                  Version:  1.9
     Severity:  Normal                |               Resolution:
     Keywords:                        |             Triage Stage:  Accepted
    Has patch:  0                     |      Needs documentation:  1
  Needs tests:  0                     |  Patch needs improvement:  0
Easy pickings:  0                     |                    UI/UX:  0
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Comment (by Ien Cheng):

 Wouldn't doing unit tests on a abstract model class be an appropriate use
 case for instantiating an abstract class? If not, what is the recommended
 approach to unit testing abstract model logic?

-- 
Ticket URL: <https://code.djangoproject.com/ticket/26977#comment:5>
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