How to interact with an undefined result in a background script?

[Jared Wason]

Hi,

I am working on a script that is looking at the RITMs for Server Decommission forms we have completed, and extracting the server names. Some of the RITMs don't have the variable 'server_name' so the result is undefined, however, I don't know how to interact with the undefined result. I tried 'if variable != 'undefined'' and 'if variable != ''" but I still am seeing the undefined result in my output log statements. How do I interact with undefined results?

var a = 0;
var b = 0;
var c = 0;
var d = 0;
var tmp = '';
var reqs = [];
var servers = [];
var retired = [];
var active = [];
getREQs(reqs);
getServers(reqs, servers);
//getHardwareStatus(servers, retired, active);

function getREQs(reqs){
	//get all the REQs of closed server decomission requests
	var gr = new GlideRecord('sc_request');
	gr.addQuery('short_descriptionSTARTSWITHserver decommission');
	gr.addQuery('request_state=closed_complete');
	gr.query();
	while(gr.next()){
		//gs.log(gr.number);
		reqs.push(gr.sys_id.getValue());
		a++;
	}
	return reqs;
}

function getServers(reqs, servers){
	//loop through the RITMs and collect the server names
	for(i = 0; i<reqs.length; i++){
		var gr2 = new GlideRecord('sc_req_item');
		gr2.addQuery('request', reqs[i]);
		gr2.query();
		while(gr2.next()){
            b++; 
			//gs.log(gr2.number);
			//gs.log(gr2.variables.server_name);
            if(gr2.variables.server_name != 'undefined'){
                c++;
				servers.push(gr2.variables.server_name);
                gs.log('REQ:' + reqs[i] + ' RITM:' + gr2.number + ' SERVER:' +gr2.variables.server_name);
            }
			//do something if server_name is undefined...		
		}	
	}
}

[Allen Andreas · Accepted solution]

Hello,

It's not a string literal of undefined, but pure undefined. So you'd want to use:

 if(gr2.variables.server_name != undefined){

or could flip it and use:

 if(gr2.variables.server_name){

Please mark reply as Helpful/Correct, if applicable. Thanks!

[Jared Wason]

Ah I knew it was a simple thing, just wasn't sure what. That worked, thanks!

[Community Alums]

What I understood from your problem, I tried to find the solution. Please check and run below code.

var a = 0;
var b = 0;
var c = 0;
var d = 0;
var tmp = '';
var reqs = [];
var servers = [];
var retired = [];
var active = [];

getREQs(reqs);
getServers(reqs, servers);

function getREQs(reqs){
//get all the REQs of closed server decomission requests
var gr = new GlideRecord('sc_request');
gr.addQuery('short_descriptionSTARTSWITHserver decommission');
gr.query();
while(gr.next()){
gs.log(gr.number);
reqs.push(gr.sys_id.getValue());
a++;
}
return reqs;
}

function getServers(reqs, servers){
//loop through the RITMs and collect the server names
var gr2 = new GlideRecord('sc_req_item');
gr2.addQuery('request', 'IN' , reqs);
gr2.query();
while(gr2.next()){
var itemvVarTask = new GlideRecord('sc_item_variables_task');
itemvVarTask.addQuery('task', gr2.getValue('sys_id'));
itemvVarTask.query();
while(itemvVarTask.next())
{
servers.push(itemvVarTask.getDisplayValue('variable'));
}
gs.log('REQ:' + gr2.request + ' RITM:' + gr2.number + ' SERVER:' +servers);
}
}