#21461: Add pre_update and post_update signals
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     Reporter:  loic84               |                    Owner:  loic84
         Type:  New feature          |                   Status:  assigned
    Component:  Database layer       |                  Version:  dev
  (models, ORM)                      |
     Severity:  Normal               |               Resolution:
     Keywords:                       |             Triage Stage:  Accepted
    Has patch:  1                    |      Needs documentation:  0
  Needs tests:  0                    |  Patch needs improvement:  1
Easy pickings:  0                    |                    UI/UX:  0
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Comment (by Olivier Dalang):

 For reference, here's a package implementing this :
 https://github.com/martinphellwig/django-query-signals
 It includes also other bulk methods such as delete or bulk_create.

 From the code, it looks like it suffers from edge case described above
 (`the original queryset doesn't work for post_update, the update might
 cause different instances to be returned than was updated, consider
 qs.filter(deleted=False).update(deleted=True)`), but nothing unfixable it
 seems.

-- 
Ticket URL: <https://code.djangoproject.com/ticket/21461#comment:18>
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