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

 @shai you are totally right, the limitation on changing pk is something we
 already discussed but I agree it needs to be documented.

 At this point @akaariai and I are not sure about how to proceed with this
 patch. Do we only introduce `post_signal`? Is there value in the
 `pre_signal` as currently implemented? Are there enough people who want
 update signals at all?

 Opinion welcome.

-- 
Ticket URL: <https://code.djangoproject.com/ticket/21461#comment:10>
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