JEXL expressions are not working in simplifiedKeyValues, keyValues and values notifications

[fgalan]

Subs

{
  "status": "active",
  "subject": {
    "entities": [
      {
        "idPattern": ".*",
        "type": "WaterMeter"
      }
    ],
    "condition": {
      "attrs": [
        "TimeInstant"
      ],
      "alterationTypes": [
        "entityCreate",
        "entityUpdate",
        "entityChange",
        "entityDelete"
      ],
      "notifyOnMetadataChange": true
    }
  },
  "notification": {
    "timesSent": 30,
    "lastNotification": "2025-02-12T16:15:50.000Z",
    "attrs": [
      "TimeInstant",
      "vol",
      "waterConsumption"
    ],
    "onlyChangedAttrs": false,
    "attrsFormat": "simplifiedKeyValues",
    "httpCustom": {
      "url": "https://webhook.site/xxx",
      "ngsi": {
        "vol": {
          "type": "Number",
          "value": "${waterConsumption - metadata.waterConsumption.previousValue}",
          "metadata": {
            "evalPriority": {
              "type": "Number",
              "value": 1
            }
          }
        }
      }
    },
    "metadata": [
      "previousValue",
      "*"
    ],
    "lastSuccess": "2025-02-12T16:15:50.000Z",
    "lastSuccessCode": 200,
    "covered": false
  }
}

Entity before update:

{
  "id": "contador1",
  "type": "WaterMeter",
  "TimeInstant": {
    "type": "DateTime",
    "value": "2025-02-10T16:42:00.000Z",
    "metadata": {}
  },
  "waterConsumption": {
    "type": "Number",
    "value": 23,
    "metadata": {}
  }
}

PATCH entity

{\n  "TimeInstant": {\n    "type": "DateTime",\n    "value": "2025-02-10T16:43:00.000Z",\n    "metadata": {}\n  },\n  "waterConsumption": {\n    "type": "Number",\n    "value": 25,\n    "metadata": {}\n  }\n}

Notification (JEXL expression is not evaluated, NOK)

{
  "id": "contador1",
  "type": "WaterMeter",
  "TimeInstant": "2025-02-10T16:43:00.000Z",
  "vol": "${waterConsumption - metadata.waterConsumption.previousValue}",
  "waterConsumption": 25,
  "alterationType": "entityChange"
}

[fgalan]

It was not working also in keyValues and values modes

[fgalan]

Solved by PR #4648

However, let's hold this issue opened for a while for possible testing, until 4.2.0 gets closed.

CC: @danielvillalbamota