Missing attributes on Orion CB Entity when registering device through IDAS

问题

I've had some troubles getting the expected results doing the exercises from http://www.slideshare.net/FI-WARE/io-t-basicexercisesdevelopersweek

No problem when registering a new device, its entity it's also successfully created on Orion CB but when querying for the created Entity non of the device attributes are shown. Created Entity just have TimeInstant attribute.

I get a 200 response code when sending observations but it apparently has noeffect since Entity attributes on CB are missing.

Registering device

URL: /iot/devices
Method: POST
Payload:

JSON

{
 "devices": [
    {
        "device_id": "14:da:e9",
        "entity_name": "Thing12",
        "entity_type": "Thing12Type",
        "protocol": "PDI-IoTA-UltraLight",
        "timezone": "Europe/Madrid",
        "attributes": [
            {
                "name": "weight",
                "type": "double",
                "object_id": "weight"
            },
            {
                "name": "valid",
                "type": "boolean",
                "object_id": "valid"
            }
        ]
    }
 ]
}

Listing devices

URL: /iot/devices/14:da:e9
Method: GET

JSON

{
"device_id": "14:da:e9",
"entity_name": "Thing12",
"entity_type": "Thing12Type",
"protocol": "PDI-IoTA-UltraLight",
"timezone": "Europe/Madrid",
"attributes": [
    {
        "name": "weight",
        "type": "double",
        "object_id": "weight"
    },
    {
        "name": "valid",
        "type": "boolean",
        "object_id": "valid"
    }
],
"service": "openiot",
"service_path": "/"
}

Querying CB

URL: /ngsi10/contextEntities/Thing12
Method: GET

JSON

{
"contextElement": {
    "type": "Thing12Type",
    "isPattern": "false",
    "id": "Thing12",
    "attributes": [
        {
            "name": "TimeInstant",
            "type": "ISO8601",
            "value": "2015-06-25T13:07:18.354970Z"
        }
    ]
},
"statusCode": {
    "code": "200",
    "reasonPhrase": "OK"
}
}

回答1:

The problem seems to be on image orion-psb-image-R4.2. After launching a new instance (CentOS-6.3init) and installing every component manually the problem seem solved. Maybe a conflict between versions in previous instance.

回答2:

Attributes are created in the ContextBroker as soon as you send observations related to those properties. Just try to send observations for "weight" and "valid" and your should be able to see those attributes at the ContextBroker related Entity.

Let us know if that worked for you.

The behaviour you observed for the non-created device was intentionally designed so that devices registration might be optional (although we do not recommend it).

Thanks for using IDAS!

来源：https://stackoverflow.com/questions/31051501/missing-attributes-on-orion-cb-entity-when-registering-device-through-idas

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