Auto-Populate A Reference Variable

[snehasaraf]

For anyone who's trying to auto-populate a reference variable on their form, I have a solution.

I was searching for a way to auto-populate my user variable "Computer Name" (which is a reference variable) for my catalog item, but found it difficult at first to find what I was looking for. One discussion I found on here helped me get started: Auto populate computer name catalog item variable based on caller.

But I needed more than that to get exactly the result I wanted, so I tinkered around with the scripts until I came to this solution. When creating the client script to auto-populate the field, it helps to have a script include similar to this (replacing the function names and some of the parameters here with your own, of course):

var GetComputer = Class.create();   
GetComputer.prototype = Object.extendsObject(AbstractAjaxProcessor, {   
   getComputer: function() {   
     var req = this.getParameter('sysparm_user_id');
     var gr = new GlideRecord('cmdb_ci_computer');   
     gr.addQuery('assigned_to', req);   
     gr.query();
     if(gr.next())   
     {   
     return gr.sys_id; // returning the sys_id ensures that all fields in the reference are retrieved
     }
   },   
   _privateFunction: function() { // this function is not client callable   
   }   
});

And here is my onChange client script:

function onChange(control, oldValue, newValue, isLoading) {
     if (isLoading || newValue == '') {
           return;
     }
     // Client script for auto-populating computer name on change
   var req = g_form.getValue('requested_for');
   var ga = new GlideAjax('GetComputer');   
   ga.addParam('sysparm_name','getComputer');   
   ga.addParam('sysparm_user_id',req);   
   ga.getXML(GetComputerParse);   
   function GetComputerParse(response) {   
       var answer = response.responseXML.documentElement.getAttribute("answer");   
   g_form.setValue('computer_name', answer);
   }   
}

Hope this helps for future reference!

[Service Manager]

Hi,

I tried your steps but unfortunately my another variable didn't get auto-populated.

Could you tell me what is the type of another variable(which gets auto-populated).

Thanks