#2361: QuerySet.filter(m2mfield__isnull=False) may return duplicates
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     Reporter:  daniel.tietze@…      |                    Owner:  Norbert
                                     |  Stüken
         Type:  Bug                  |                   Status:  assigned
    Component:  Database layer       |                  Version:  dev
  (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
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Comment (by Csirmaz Bendegúz):

 I think this is a well-known Django "gotcha", {{{distinct()}}} has a big
 performance impact so I would definitely advise against it.
-- 
Ticket URL: <https://code.djangoproject.com/ticket/2361#comment:22>
Django <https://code.djangoproject.com/>
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