Expression key has a value with {} in a trigger.get

[Alberto Tagliasacchi]

Hi all,
I'm wondering what does the value inside {} mean in the value of the key "expression" in the json result of a trigger.get ?
Using Zabbix 6.0

Here an example:
{
"jsonrpc": "2.0",
"result": [
{
"triggerid": "634369",
"expression": "{652522}<-70",
"description": "RF Level low {HOSTNAME} Radio Port 1",
"url": "",
"status": "0",

The corresponding trigger 634369 has the following expression:
"avg(/R12-C21/genEquipRfuStatusRxLevel.268451969,10m)<-70", so I thought is sometihng related to hostid+key.

Searching the answer, I found some examples that state it's a functionid, but still cannot reach details on that, don't know which method can retrieve it

Waiting for hearing from You!

Regards

Alberto

[Alberto Tagliasacchi]

I found: the value inside {} is the functionid. You can see it, using the method trigger.get with params "selectFunctions": "extend":

Example:

Result:
"result": [
{
"triggerid": "634369",
"expression": "{652522}<-70",
.
.
"functions": [
{
"functionid": "652522",
"itemid": "2506528",
"triggerid": "634369",
"parameter": "$,10m",
"function": "avg"

[Alberto Tagliasacchi]

I found: the value inside {} is the functionid. You can see it, using the method trigger.get with params "selectFunctions": "extend":

Example:

Result:
"result": [
{
"triggerid": "634369",
"expression": "{652522}<-70",
.
.
"functions": [
{
"functionid": "652522",
"itemid": "2506528",
"triggerid": "634369",
"parameter": "$,10m",
"function": "avg"