GET a subresource where parent doesn't exist doesn't return 404

GET /nodes/<id>/ports OR /chassis/<id>/nodes will not fail with a 404 in case the <id> does not exist, I think it should cause we are trying to access a subresource of a resource that doesn't not exist.

On chassis:

$ curl -X GET http://0.0.0.0:6385/v1/chassis/64ec49cf-8881-4ceb-ba9e-cf9d67b63e69/nodes | python -mjson.tool
  % Total % Received % Xferd Average Speed Time Time Time Current
                                 Dload Upload Total Spent Left Speed
100 13 100 13 0 0 1219 0 --:--:-- --:--:-- --:--:-- 1300
{
    "nodes": []
}

$ curl -X GET http://0.0.0.0:6385/v1/chassis/64ec49cf-8881-4ceb-ba9e-cf9d67b63e69 | python -mjson.tool
  % Total % Received % Xferd Average Speed Time Time Time Current
                                 Dload Upload Total Spent Left Speed
100 156 100 156 0 0 3428 0 --:--:-- --:--:-- --:--:-- 3466
{
    "error_message": "{\"debuginfo\": null, \"faultcode\": \"Server\", \"faultstring\": \"Chassis 64ec49cf-8881-4ceb-ba9e-cf9d67b63e69 could not be found.\"}"
}

On nodes:

$ curl -X GET http://0.0.0.0:6385/v1/nodes/5298429b-00b0-4628-8b4d-44d40ac69f58/ports | python -mjson.tool
  % Total % Received % Xferd Average Speed Time Time Time Current
                                 Dload Upload Total Spent Left Speed
100 13 100 13 0 0 1306 0 --:--:-- --:--:-- --:--:-- 1444
{
    "ports": []
}

$ curl -X GET http://0.0.0.0:6385/v1/nodes/5298429b-00b0-4628-8b4d-44d40ac69f58 | python -mjson.tool
  % Total % Received % Xferd Average Speed Time Time Time Current
                                 Dload Upload Total Spent Left Speed
100 153 100 153 0 0 968 0 --:--:-- --:--:-- --:--:-- 974
{
    "error_message": "{\"debuginfo\": null, \"faultcode\": \"Server\", \"faultstring\": \"Node 5298429b-00b0-4628-8b4d-44d40ac69f58 could not be found.\"}"
}