#33505: Inconsistent Behavior with Abstract Models and Signals
-------------------------------------+-------------------------------------
     Reporter:  Ken Weaver           |                    Owner:  nobody
         Type:  Bug                  |                   Status:  closed
    Component:  Database layer       |                  Version:  3.2
  (models, ORM)                      |
     Severity:  Normal               |               Resolution:  invalid
     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 Mariusz Felisiak):

 Replying to [comment:6 Ken Weaver]:
 > I now understand why; I just checked and `Abstract.m2m_field.through`
 itself is actually `None`. This makes sense (somewhat) since of course you
 can't have a concrete many to many table for an abstract model.

 Ahh, yes. You can set `sender` to `None` to receive events from any
 sender.

 > I would think one could change `ManyToManyField` to itself be some kind
 of abstract model or a dummy class when attached to an abstract model, but
 you will know more about the inners of Django to know if something like
 that is feasible or justified.

 I don't think it is feasible.

-- 
Ticket URL: <https://code.djangoproject.com/ticket/33505#comment:7>
Django <https://code.djangoproject.com/>
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