incorrect info returned when show aggregate info

[hgangwx]

[Summary]
incorrect info returned when show aggregate info

[Topo]
devstack all-in-one node

[Description and expect result]
correct info returned when show aggregate info

[Reproduceable or not]
reproduceable

[Recreate Steps]
1) create an aggregate, availability_zone is not specified:
root@45-59:~# openstack aggregate create agg1
+-------------------+----------------------------+
| Field | Value |
+-------------------+----------------------------+
| availability_zone | None |
| created_at | 2016-01-26T14:23:24.000000 |
| deleted | False |
| deleted_at | None |
| id | 6 |
| name | agg1 |
| updated_at | None |
+-------------------+----------------------------+
root@45-59:~#
root@45-59:~#
root@45-59:~# openstack aggregate list
+----+------+-------------------+
| ID | Name | Availability Zone |
+----+------+-------------------+
| 6 | agg1 | None | >>>>ISSUE, availability_zone is shown as "None"
+----+------+-------------------+
root@45-59:~#

ISSUE: availability_zone can be shown as "-"

2)below is nova cmd for reference:
root@45-59:~# nova aggregate-details agg1
+----+------+-------------------+-------+----------+
| Id | Name | Availability Zone | Hosts | Metadata |
+----+------+-------------------+-------+----------+
| 6 | agg1 | - | | |
+----+------+-------------------+-------+----------+
root@45-59:~#
root@45-59:~# nova aggregate-list
+----+------+-------------------+
| Id | Name | Availability Zone |
+----+------+-------------------+
| 6 | agg1 | - |
+----+------+-------------------+
root@45-59:~#

[Configration]
reproduceable bug, no need

[logs]
reproduceable bug, no need

[Root cause anlyze or debug inf]
reproduceable bug

[Attachment]
None

[Markus Zoeller (markus_z) (mzoeller)]

bug skimming
------------------
It looks like the python-openstackclient handles empty values different than the python-novalient CLI. As the Nova API returns the values as is and the python-novaclient handles it as expected, I thing the issue (if any) is in the python-openstackclient.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/300934

[OpenStack Infra (hudson-openstack)]

Change abandoned by Hieu LE (<email address hidden>) on branch: master
Review: https://review.openstack.org/300934