Retrieve the values of multiple children nested within a parent JSON object

Within this JSON object snippet, I aim to extract the triggerid of each child object. While I can retrieve the first triggerid using the provided code line,

 var gettrigger = eventdata.result[0].relatedObject.triggerid;

I am unsure how to gather the triggerid of every child and store them in an array. Can you provide guidance on achieving this?

var event = {
   "jsonrpc":"2.0",
   "result":[
      {
         "eventid":"964101",
         "name":"unreachable last 5 minutes",
         "severity":"0",
         "acknowledged":"0",
         "clock":"1578456800",
         "hosts":[
            {
               "hostid":"11195",
               "name":"Vi-console"
            }
         ],
         "relatedObject":{
            "triggerid":"23630"
         }
      },
      {
         "eventid":"964091",
         "name":"unreachable last 5 minutes",
         "severity":"0",
         "acknowledged":"0",
         "clock":"1578456695",
         "hosts":[
            {
               "hostid":"11180",
               "name":"Net-fluid"
            }
         ],
         "relatedObject":{
            "triggerid":"23375"
         }
      },
      {
         "eventid":"964090",
         "name":"high cpu usage",
         "severity":"3",
         "acknowledged":"0",
         "clock":"1578456675",
         "hosts":[
            {
               "hostid":"11188",
               "name":"Net-OFFICE"
            }
         ],
         "relatedObject":{
            "triggerid":"23503"
         }
      }
   ]
}
javascriptarraysjson

Answer №1

To extract specific data from an array, you can utilize the .map() function in JavaScript. Here is an example code snippet:

var arr = eventdata.result.map(data => data.relatedObject.triggerid);


var eventdata = {
   "jsonrpc":"2.0",
   "result":[
      {
         "eventid":"964101",
         "name":"unreachable last 5 minutes",
         "severity":"0",
         "acknowledged":"0",
         "clock":"1578456800",
         "hosts":[
            {
               "hostid":"11195",
               "name":"Vi-console"
            }
         ],
         "relatedObject":{
            "triggerid":"23630"
         }
      },
      {
         "eventid":"964091",
         "name":"unreachable last 5 minutes",
         "severity":"0",
         "acknowledged":"0",
         "clock":"1578456695",
         "hosts":[
            {
               "hostid":"11180",
               "name":"Net-fluid"
            }
         ],
         "relatedObject":{
            "triggerid":"23375"
         }
      },
      {
         "eventid":"964090",
         "name":"high cpu usage",
         "severity":"3",
         "acknowledged":"0",
         "clock":"1578456675",
         "hosts":[
            {
               "hostid":"11188",
               "name":"Net-OFFICE"
            }
         ],
         "relatedObject":{
            "triggerid":"23503"
         }
      }
   ]
};

var arr = eventdata.result.map(data => data.relatedObject.triggerid);

console.log(arr)

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