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[Akihiro Motoki <1733207@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

If action() in BatchAction displays an error message to describe some detail reason of a failure, a user will get multiple error messages: the detail error message and "Unable to <action> <object>".
This is because BatchAction handle() always tries to display error message. We need more smart error message handling.

On the other hand, if there is no need to display a detail error message
in action() of individual BatchAction instance, try/except should not be
used.

** Affects: horizon
     Importance: Low
     Assignee: Akihiro Motoki (amotoki)
         Status: New


** Tags: error-reporting

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https://bugs.launchpad.net/bugs/1733207

Title:
  BatchAction displays error messages twice

Status in OpenStack Dashboard (Horizon):
  New

Bug description:
  If action() in BatchAction displays an error message to describe some detail reason of a failure, a user will get multiple error messages: the detail error message and "Unable to <action> <object>".
  This is because BatchAction handle() always tries to display error message. We need more smart error message handling.

  On the other hand, if there is no need to display a detail error
  message in action() of individual BatchAction instance, try/except
  should not be used.

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