Heat Update Stack Preview does not contain flavor and volume details for newly added server resources (os::nova::Server)

[Govind Agrawal]

API used:
/v1/{tenant_id}/stacks/{stack_name}/{stack_id}/preview
Preview stack update

URL for API:
https://developer.openstack.org/api-ref/orchestration/v1/?expanded=list-stack-resources-detail,list-stacks-detail,delete-stack-detail,suspend-stack-detail,preview-stack-update-detail,preview-stack-detail,create-stack-detail

Here you can see , in attributes it does not contain "flavor", "os-extended-volumes:volumes_attached" for newly added server resource(os::nova::server). here we can see only 8 attributes though in case of delete resources it has many attributes. From stack update preview point of view, it is really essential to have flavor and volume information. please revert.

"added": [
      {
        "attributes": {
          "accessIPv4": "",
          "accessIPv6": "",
          "addresses": "",
          "console_urls": "",
          "first_address": "",
          "instance_name": "",
          "name": null,
          "networks": ""
        },
        "creation_time": null,
        "description": "",
        "metadata": {},
        "physical_resource_id": "",
        "required_by": [],
        "resource_action": "INIT",
        "resource_identity": {
          "path": "/resources/instancegovmai1n-",
          "stack_id": "39480208-ac12-4023-8cc8-3ce460b33fc0",
          "stack_name": "Single-Server-Stack",
          "tenant": "68dee30f86344f14a650d0c75813801d"
        },
        "resource_name": "instancegovmai1n-",
        "resource_status": "COMPLETE",
        "resource_status_reason": "",
        "resource_type": "OS::Nova::Server",
        "stack_identity": {
          "path": "",
          "stack_id": "39480208-ac12-4023-8cc8-3ce460b33fc0",
          "stack_name": "Single-Server-Stack",
          "tenant": "68dee30f86344f14a650d0c75813801d"
        },
        "stack_name": "Single-Server-Stack",
        "updated_time": null
      }
    ],

"deleted": [
      {
        "attributes": {
          "OS-DCF:diskConfig": "MANUAL",
          "OS-EXT-AZ:availability_zone": "nova",
          "OS-EXT-STS:power_state": 1,
          "OS-EXT-STS:task_state": null,
          "OS-EXT-STS:vm_state": "active",
          "OS-SRV-USG:launched_at": "2017-05-08T15:06:51.000000",
          "OS-SRV-USG:terminated_at": null,
          "accessIPv4": "",
          "accessIPv6": "",
          "addresses": {
            "AFR-ECOMPNETWORK": [
              {
                "OS-EXT-IPS-MAC:mac_addr": "fa:16:3e:52:9b:90",
                "OS-EXT-IPS:type": "fixed",
                "addr": "10.10.1.190",
                "version": 4
              }
            ]
          },
          "config_drive": "",
          "created": "2017-05-08T15:06:38Z",
          "flavor": {
            "id": "205bb2df-d4fa-4478-bf97-cb2e69d440b5",
            "links": [
              {
                "href": "http://131.160.203.5:8774/68dee30f86344f14a650d0c75813801d/flavors/205bb2df-d4fa-4478-bf97-cb2e69d440b5",
                "rel": "bookmark"
              }
            ]
          },
          "hostId": "b9efc004da62170279dd147ff6f558326b91fbf43d6b09b741c2661b",
          "id": "d866e593-5552-4614-81ee-f8e5e060a0b0",
          "image": {
            "id": "26b9f717-137e-41e0-adbe-78346f72ba63",
            "links": [
              {
                "href": "http://131.160.203.5:8774/68dee30f86344f14a650d0c75813801d/images/26b9f717-137e-41e0-adbe-78346f72ba63",
                "rel": "bookmark"
              }
            ]
          },
          "key_name": null,
          "links": [
            {
              "href": "http://131.160.203.5:8774/v2.1/68dee30f86344f14a650d0c75813801d/servers/d866e593-5552-4614-81ee-f8e5e060a0b0",
              "rel": "self"
            },
            {
              "href": "http://131.160.203.5:8774/68dee30f86344f14a650d0c75813801d/servers/d866e593-5552-4614-81ee-f8e5e060a0b0",
              "rel": "bookmark"
            }
          ],
          "metadata": {},
          "name": "Single-Server-Stack-instancegovmain--wpnwnmf3k2xz",
          "os-extended-volumes:volumes_attached": [
            {
              "id": "c1e4e0eb-b3e7-4d9c-b197-51fe629c455f"
            }
          ],
          "progress": 0,
          "security_groups": [
            {
              "name": "default"
            }
          ],
          "status": "ACTIVE",
          "tenant_id": "68dee30f86344f14a650d0c75813801d",
          "updated": "2017-05-08T15:06:51Z",
          "user_id": "51c410747d4a4114b88c4a72e1ddce87"
        },
        "creation_time": "2017-05-08T15:06:36",
        "description": "",
        "metadata": {},
        "physical_resource_id": "d866e593-5552-4614-81ee-f8e5e060a0b0",
        "required_by": [
          "volume_attachment"
        ],
        "resource_action": "CREATE",
        "resource_identity": {
          "path": "/resources/instancegovmain-",
          "stack_id": "39480208-ac12-4023-8cc8-3ce460b33fc0",
          "stack_name": "Single-Server-Stack",
          "tenant": "68dee30f86344f14a650d0c75813801d"
        },
        "resource_name": "instancegovmain-",
        "resource_status": "COMPLETE",
        "resource_status_reason": "state changed",
        "resource_type": "OS::Nova::Server",
        "stack_identity": {
          "path": "",
          "stack_id": "39480208-ac12-4023-8cc8-3ce460b33fc0",
          "stack_name": "Single-Server-Stack",
          "tenant": "68dee30f86344f14a650d0c75813801d"
        },
        "stack_name": "Single-Server-Stack",
        "updated_time": "2017-05-08T15:06:36"
      },

[Govind Agrawal (govind12)]

The output for new added server resource (os::nova::Server) in "Update Heat Stack preview" should be identical to "Heat Stack Create preview". but that is not the case.