why does flavor attribute only returns id on my call here (get server list : /servers/detail, https://developer.openstack.org/api-ref/compute/#list-servers) :

Array
(
    [0] => Array
        (
	........
            [flavor] => Array
                (
                    [id] => 8fbb7ade-4721-405c-931f-11fdefd5bffc
                    [links] => Array
                        (
                            [0] => Array
                                (
                                    [href] => http://xxx.xxx.xxx.xxx/flavors/8fbb7ade-4721-405c-931f-11fdefd5bffc
                                    [rel] => bookmark
                                )

                        )

                )


although, on the documentation on https://developer.openstack.org/api-ref/compute/#list-servers (response example) i can get complete info of flavor :

  "flavor": {
                "disk": 1,
                "ephemeral": 0,
                "extra_specs": {
                    "hw:cpu_model": "SandyBridge",
                    "hw:mem_page_size": "2048",
                    "hw:cpu_policy": "dedicated"
                },
                "original_name": "m1.tiny.specs",
                "ram": 512,
                "swap": 0,
                "vcpus": 1
            },