Created question in FIWARE Q/A platform on 08-03-2017 at 10:03
Please, ANSWER this question AT https://stackoverflow.com/questions/42667222/fiware-sth-row-data-api-not-exposing-metadata

Question:
Fiware STH: row data API not exposing metadata

Description:
I am using Cygnus with Mongo and sth sink to retrieve historical data.

In the current implementation of cygnus mongo sink the attribute metadata is not stored in the data base. So I updated cygnus to be able to store the attribute metadata.
But when I use the STH-comet to retrieve the history, the API appreantly does not support retrieveing the attribute metadata.

Am I missing some kind of configuration or the API is not supporting the attribute metadata since the response that I am getting from STH-comet is:

{
"contextResponses": [
{
"contextElement": {
"attributes": [
{
"name": "humidity",
"values": [

,

]
}
],
"id": "Room1",
"isPattern": false,
"type": "Room"
},
"statusCode":

}
]
}

In the mongoDB data base I have this content:

{ "_id" : ObjectId("58bfbc93973c5c22d258cffd"), "recvTime" : ISODate("2017-03-08T08:10:54.199Z"), "attrName" : "humidity", "attrType" : "Number", "attrValue" : "3.06", "attrMetadata" : [

] }

In case the API is not supporting the retrieval of the attribute metadata, can this feature be added?

Thanks & Best regards.