DataTime in Perseo CEP - fiware

Question

I am using CEP to modify type date fields with update mode.
Entities:
{
"id":"controller",
"type":"control",
"lasmodify":{
"type":"DataTime",
"value":""
}
}
{
"id":"Device01",
"type":"device",
"id_controller":{
"type":"Text",
"value":"controller01"
}
"datemodify":{
"type":"DataTime",
"value":"2018-12-04T20:05:00.00Z"
}
}
I want that the Device01 subscription is shooted, the controller01 attribute lasmodify will be modified with datemodify of device01 entity.
Thank you very much in advance
Best regard.

Answer 1

If i have understood correctly, you want to update the controler when CEP recibes a device change notification.
The solution should be something similar to this rule:
{
"name":"update_rule",
"text":"select ev.controler? as controlerID, ev.datemodify? as newDate, \"update_rule\" as ruleName from pattern [every ev=iotEvent(type=\"device\")]",
"action":{
"type":"update",
"parameters":{
"id":"${controlerID}",
"type":"control",
"attributes": [
{
"name":"lasmodify",
"type":"DataTime"
"value":"${newDate}"
}
]
}
}
}
I don't know what version of Perseo you use, but using the latest fiware image for perseo-fe and perseo-core, you could omit the ruleName and use NGSIv2
{
"name":"update_rule",
"text":"select ev.controler? as controlerID, ev.datemodify? as newDate from pattern [every ev=iotEvent(type=\"device\")]",
"action":{
"type":"update",
"parameters":{
"id":"${controlerID}",
"type":"control",
"version": "2",
"attributes": [
{
"name":"lasmodify",
"type":"DataTime"
"value":"${newDate}"
}
]
}
}
}