Comment 0 for bug 2069938

trait show API only returns 204, not even trait ID if trait exits, which does not help much, I should tell more.
https://docs.openstack.org/api-ref/placement/#show-traits

Show should atleast have in-use information.

$ openstack trait show CUSTOM_WB_HOST2
+-------+-----------------+
| Field | Value |
+-------+-----------------+
| name | CUSTOM_WB_HOST2 |
+-------+-----------------+

Use case:
operator need to delete a trait.

$ openstack trait delete CUSTOM_WB_HOST2
The trait CUSTOM_WB_HOST2 is in use by a resource provider. (HTTP 409)

trait DB do not have status or in-use field.

MariaDB [placement]> desc traits
    -> ;
+------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+------------+--------------+------+-----+---------+----------------+
| created_at | datetime | YES | | NULL | |
| updated_at | datetime | YES | | NULL | |
| id | int(11) | NO | PRI | NULL | auto_increment |
| name | varchar(255) | NO | UNI | NULL | |
+------------+--------------+------+-----+---------+----------------+