Why this orion subscription don't works as I want? - fiware

Question

I have the following subscription in orion 1.2.1:
curl --include \
--header 'Content-Type: application/json' \
--request POST \
--data-binary '{
"description": "subscription",
"subject": {
"entities": [
{
"idPattern": "event-.*",
"type": "Event"
}
],
"condition": {
"attrs": [
"IdEvent",
"mFlag"
],
"expression": {
"q": "mFlag>0"
}
}
},
"notification": {
"attrsFormat":"legacy",
"http": {
"url" : "http://localhost:5050/notify"
},
"attrs": [
"IdEvent"
]
}
}' \
'http://localhost:1026/v2/subscriptions'
When I send an entity update like this one:
curl --include \
--request PATCH \
--header "Content-Type: application/json" \
--data-binary '{
"mFlag":{
"value":"5",
"type":"int"
}
}' \
'http://localhost:1026/v2/entities/event-2/attrs'
Orion is not notifiying and it is making me crazy don't know what is wrong. Any idea?
When I remove this part of the subscription:
"expression": {
"q": "mFlag>0"
}
it works but I need it to notify when any attribute is changed and the condition is satisfied.

Answer 1

Note that in NGSIv2 "5" is a string, not a number. Thus, in order to make the "q": "mFlag>0" filter works as expected, use the following update:
curl --include \
--request PATCH \
--header "Content-Type: application/json" \
--data-binary '{
"mFlag":{
"value":5,
"type":"int"
}
}' \
'http://localhost:1026/v2/entities/event-2/attrs'