Created question in FIWARE Q/A platform on 20-02-2019 at 04:02
Please, ANSWER this question AT https://stackoverflow.com/questions/54778164/fiware-orion-subscription-sending-empty-body

Question:
Fiware orion subscription sending empty body

Description:
My setup:
docker-compose:

version: "3.1"
services:
mongo-db:
image: mongo:3.6
hostname: mongo-db
container_name: db-mongo
expose:

• "27017"
  ports:
• "27017:27017"
  networks:
• default
  command: --bind_ip_all --smallfiles
  volumes:
• mongo-db:/data

orion:
image: fiware/orion:2.1.0
hostname: orion
container_name: fiware-orion
depends_on:

• mongo-db
  networks:
• default
  expose:
• "1026"
  ports:
• "1026:1026"
  command: -dbhost mongo-db -logLevel DEBUG
  logging:
  driver: none
  healthcheck:
  test: curl --fail -s http://localhost:1026/version || exit 1

iot-agent:
image: fiware/iotagent-ul:latest
hostname: iot-agent
container_name: fiware-iot-agent
depends_on:

• mongo-db
  networks:
• default
  expose:
• "4041"
• "7896"
  ports:
• "4041:4041"
• "7896:7896"
  logging:
  driver: none
  environment:
• "IOTA_CB_HOST=orion"
• "IOTA_CB_PORT=1026"
• "IOTA_NORTH_PORT=4041"
• "IOTA_REGISTRY_TYPE=mongodb"
• "IOTA_LOG_LEVEL=DEBUG"
• "IOTA_TIMESTAMP=true"
• "IOTA_MONGO_HOST=mongo-db"
• "IOTA_MONGO_PORT=27017"
• "IOTA_MONGO_DB=iotagentul"
• "IOTA_HTTP_PORT=7896"
• "IOTA_PROVIDER_URL=http://iot-agent:4041"

networks:
default:
ipam:
config:

• subnet: 172.18.1.0/24

volumes:
mongo-db: ~

context:

curl -iX POST \
'http://localhost:1026/v2/op/update' \
-H 'Content-Type: application/json' \
-H 'fiware-service: didi' \
-H 'fiware-servicepath: /' \
-d '{
"actionType":"APPEND",
"entities":[
{
"id":"urn:ngsi-ld:Furniture:unit001", "type":"Furniture",
"name":

{ "type":"Text", "value":"Bürostuhl" }

,
"price":

{ "type":"Integer", "value":404.40 }

},
{
"id":"urn:ngsi-ld:Furniture:unit002", "type":"Furniture",
"name":

{ "type":"Text", "value":"Bürotisch" }

,
"price":

{ "type":"Integer", "value":203.40 }

},
{
"id":"urn:ngsi-ld:DeliverService:unit001", "type":"ServiceProvider",
"name":

{ "type":"Text", "value":"trinkajo" }

,
"address":{
"type":"PostalAddress",
"value":

{ "telephoneNumber":"43q4q53", "internetAdresse":"https://www.345345.de/" }

}
},
{
"id":"urn:ngsi-ld:BottleCounter:001", "type":"BottleCounter",
"name":

{ "type":"Text", "value":"Wasserflaschenzähler" }

,
"numberOfBottles":

{"type":"Integer", "value":645}

}
]
}'

curl -iX POST \
'http://localhost:1026/v2/op/update' \
-H 'Content-Type: application/json' \
-H 'fiware-service: didi' \
-H 'fiware-servicepath: /' \
-d '{
"actionType":"APPEND",
"entities":[
{
"id":"urn:ngsi-ld:Furniture:unit001", "type":"Furniture",
"refOffice":

{ "type": "Relationship", "value": "urn:ngsi-ld:Office:001" }

},
{
"id":"urn:ngsi-ld:Furniture:unit002", "type":"Furniture",
"refOffice":

{ "type": "Relationship", "value": "urn:ngsi-ld:Office:001" }

},
{
"id":"urn:ngsi-ld:DeliverService:unit001", "type":"ServiceProvider",
"refOffice":

{ "type": "Relationship", "value": "urn:ngsi-ld:Office:001" }

}
]
}'
curl -iX POST \
'http:

//localhost:1026/v2/op/update' \
-H 'Content-Type: application/json' \
-H 'fiware-service: didi' \
-H 'fiware-servicepath: /' \
-d '{
"actionType":"APPEND",
"entities":[
{
"id":"urn:ngsi-ld:Office:001", "type" : "Office",
"name":

{ "type":"Text", "value":"didi-Hamburg" }

,
"sizeInM2":

{ "type":"Integer", "value":60 }

,
"address":{
"type":"PostalAddress",
"value":

{ "country":"Germany", "locality":"sdfg", "street":"sdfg", "houseNumber" : "34", "postalCode":"34533" }

}
}
]
}'

curl -iX POST \
'http://localhost:4041/iot/services' \
-H 'Content-Type: application/json' \
-H 'fiware-service: didi' \
-H 'fiware-servicepath: /' \
-d '{
"services": [

{ "apikey": "4jggokgpepnvsb2uv4s40d59ov", "cbroker": "http://orion:1026", "entity_type": "Thing", "resource": "/iot/d" }

]
}'
curl -G -X GET \
'http://localhost:1026/v2/entities/urn:ngsi-ld:Office:001' \
-H 'fiware-service: didi' \
-H 'fiware-servicepath: /' \
-d 'type=Office' \
-d 'options=keyValues' | json_pp

curl -iX POST \
'http://localhost:4041/iot/devices' \
-H 'Content-Type: application/json' \
-H 'fiware-service: didi' \
-H 'fiware-servicepath: /' \
-d '{
"devices": [
{
"device_id": "bottleCounter001",
"entity_name": "urn:ngsi-ld:BottleCounter:001",
"entity_type": "BottleCounter",
"timezone": "Europe/Berlin",
"attributes": [

{ "object_id": "c", "name": "numberOfBottles", "type": "Integer" }

],
"static_attributes": [

{ "name":"refOffice", "type": "Relationship", "value": "urn:ngsi-ld:Office:001"}

]
}
]
}'

The subscription:

curl -iX POST \
--url 'http://localhost:1026/v2/subscriptions' \
--header 'Content-Type: application/json' \
-H 'fiware-service: didi' \
-H 'fiware-servicepath: /' \
--data '{
"description": "Notify me of low stock in Office 001",
"subject": {
"entities": [

{"idPattern": ".*", "type" : "BottleCounter"}

],
"condition": {
"attrs": ["numberOfBottles"],
"expression":

{"q": "numberOfBottles<10;refOffice==urn:ngsi-ld:Office:001"}

}
},
"notification": {
"http":

{ "url": "http://delivery:8080/subscription/office" }

}
}'

I have several problems:

With the condition numberOfBottles<10 the subscription never get triggered. When I use something like numberOfBottles!=10 it is working
There is only an empty body sent to the url http://delivery:8080/subscription/office

A bonus question: if I can fix the first issues:
Is there a way to send the attribute address from urn:ngsi-ld:DeliverService:unit001 to the url http://delivery:8080/subscription/office when the subscription get triggered?