Comment 5 for bug 1681348

also for keystone:

https://{{keystone_ip}}:5000/v3/domains?enabled= is behaving differently, it returns all domains disregarding enabled/or disabled.

Thank you for Kristi's explanation. normally,

Since the url params are filtering strings, when the url param is appended but equals to <empty>, it implies that the filter is not applied. thus, it returns all values without filtering. I feel it's more a common way as nova/neutron is implemented.