#27074: connection.is_usable() raises AttributeError after the connection is 
closed
-------------------------------------+-------------------------------------
     Reporter:  cjerdonek            |                    Owner:  nobody
         Type:                       |                   Status:  new
  Cleanup/optimization               |
    Component:  Database layer       |                  Version:  1.10
  (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
-------------------------------------+-------------------------------------

Comment (by aaugustin):

 This is a private API that Django primarily calls inside an `if
 self.connection is not None:` block (and secondarily in testing tools
 where database connection breakage isn't a concern and will abort tests in
 general). For this reason, I don't expect this issue to appear through the
 use of public APIs.

 I'm -0 on making that change but I understand that we might have to add a
 useless check just to stop these bugs reports. The performance impact will
 be negligible.

--
Ticket URL: <https://code.djangoproject.com/ticket/27074#comment:9>
Django <https://code.djangoproject.com/>
The Web framework for perfectionists with deadlines.

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