Created question in FIWARE Q/A platform on 02-09-2016 at 10:09
Please, ANSWER this question AT http://stackoverflow.com/questions/39287361/cygnus-mongo-sink-and-meta-data-storing

Question:
cygnus mongo sink and meta data storing

Description:
I tried to stored this meta data entity but seems like cygnus is only storing entity data no meta data was stored in the data base.

Here is how I update my entity using NGSI v1 updateContext

{
"contextElements": [
{
"type": "dummyMeta",
"isPattern": "false",
"id": "dummyMeta",
"attributes": [
{
"name": "dummy",
"type": "float",
"value": "26.5",
"metadatas": [

]
}
]
}
],
"updateAction": "APPEND"
}

Here is the payload subscription:

{

"entities": [

],

"attributes": [
"dummy"
]

,
"reference": "http://cygnusserver.ddns.net:5050/notify",
"duration":"P1M",
"notifyConditions": [

],
"throttling": "PT5S"
}

here is how it is stored in the data base

> db['kura_/egmmqtt_dummyMeta_dummyMeta'].find().sort({$natural:-1})

What am I missing to be able to store the whole information (data and metadata) about the attribute?
Thanks in advance for your help!