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[Lance Bragstad <lbragstad@xxxxxxxxx>]

Public bug reported:

The region table doesn't allow for nullable descriptions [1] . The
catalog Manager checks if region['description'] is set in the request
and if the user hasn't provided a description for the region, the
Manager will set it to an empty string [2]. If the user creates a region
with a description and then later tries to update the description to be
None, or an empty string, the request will fail because validation
against the description field will fail.

 Invalid input for field 'description'. The value is 'None'.

The user should be able to pass None, or null in json, to Keystone in a
region request. Region description are documented as being optional.

[1] https://github.com/openstack/keystone/blob/2d829b4d9a886909735daa0f8a9419c8ba8d3f87/keystone/common/validation/parameter_types.py#L40-L42
[2] https://github.com/openstack/keystone/blob/2d829b4d9a886909735daa0f8a9419c8ba8d3f87/keystone/catalog/core.py#L103-L106

** Affects: keystone
     Importance: Undecided
     Assignee: David Stanek (dstanek)
         Status: In Progress

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https://bugs.launchpad.net/bugs/1398165

Title:
  Unable to update a region description to None

Status in OpenStack Identity (Keystone):
  In Progress

Bug description:
  The region table doesn't allow for nullable descriptions [1] . The
  catalog Manager checks if region['description'] is set in the request
  and if the user hasn't provided a description for the region, the
  Manager will set it to an empty string [2]. If the user creates a
  region with a description and then later tries to update the
  description to be None, or an empty string, the request will fail
  because validation against the description field will fail.

   Invalid input for field 'description'. The value is 'None'.

  The user should be able to pass None, or null in json, to Keystone in
  a region request. Region description are documented as being optional.

  [1] https://github.com/openstack/keystone/blob/2d829b4d9a886909735daa0f8a9419c8ba8d3f87/keystone/common/validation/parameter_types.py#L40-L42
  [2] https://github.com/openstack/keystone/blob/2d829b4d9a886909735daa0f8a9419c8ba8d3f87/keystone/catalog/core.py#L103-L106

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