on incident form it is show this at caller field "onChange script error: ReferenceError: caller_i"

[Kongaleti Navee]

function onChange(control, oldValue, newValue, isLoading, isTemplate) {

    if (isLoading || newValue === '') {

        return;

    }

    var ga = new GlideAjax('SI_ReturnUserDetails');

    ga.addParam('sysparam_name','returnDetails');

    ga.addParam('sysparam_caller_id',g_form.getValue(caller_id));

    ga.getXML(displayUserDetails);

    function displayUserDetails(response) {

        var answer = response.responseXML.documentElement.getAttribute("answer");

        alert(answer);

        var result = JSON.parse(answer);

        g_form.setValue('u_email',result.email);

        g_form.setValue('u_firstname',result.firstName);

        g_form.setValue('u_lastname',result.lastName);

    }

}

var SI_ReturnUserDetails = Class.create();

SI_ReturnUserDetails.prototype = Object.extendsObject(AbstractAjaxProcessor, {

returnDetails:function(){

    var sys_id =this.getParameter('sysparam_caller_id');

    var gr=new GlideRecord('sys_user');

    gr.get(sys_id);

    var usrobj = {};

    usrobj.email =gr.email.toString();

    usrobj.firstName =gr.firstName.toString();

    usrobj.lastName =gr.lastName.toString();

    return JSON.stringify('usrobj');

},

    type: 'SI_ReturnUserDetails'

});

[Aniket Chavan]

Hello @Kongaleti Navee 

Please give a try to the script below and let me know how it works for you.
Script Include (SI_ReturnUserDetails):

var SI_ReturnUserDetails = Class.create();
SI_ReturnUserDetails.prototype = Object.extendsObject(AbstractAjaxProcessor, {

    returnDetails: function () {
        var sys_id = this.getParameter('sysparam_caller_id');

        var gr = new GlideRecord('sys_user');
        gr.get(sys_id);

        var usrobj = {
            email: gr.email.toString(),
            firstName: gr.firstName.toString(),
            lastName: gr.lastName.toString()
        };

        return JSON.stringify(usrobj);
    },

    type: 'SI_ReturnUserDetails'
});

Client Script:

function onChange(control, oldValue, newValue, isLoading, isTemplate) {
    if (isLoading || newValue === '') {
        return;
    }

    var ga = new GlideAjax('SI_ReturnUserDetails');
    ga.addParam('sysparam_name', 'returnDetails');
    ga.addParam('sysparam_caller_id', g_form.getValue('caller_id'));
    ga.getXML(displayUserDetails);

    function displayUserDetails(response) {
        var answer = response.responseXML.documentElement.getAttribute("answer");
        alert(answer);

        var result = JSON.parse(answer);
        setFormValues(result);
    }

    function setFormValues(userDetails) {
        g_form.setValue('u_email', userDetails.email);
        g_form.setValue('u_firstname', userDetails.firstName);
        g_form.setValue('u_lastname', userDetails.lastName);
    }
}

Let me know your views on this and Mark ✅Correct if this solves your query and also mark 👍Helpful if you find my response worthy based on the impact.

Thanks,

Aniket

[Harish Bainsla]

Hi check with this code and refer below video

function onChange(control, oldValue, newValue, isLoading, isTemplate) {
if (isLoading || newValue === '') {
return;
}

var ga = new GlideAjax('SI_ReturnUserDetails');
ga.addParam('sysparam_name', 'returnDetails');

// Corrected variable name from caller_id to 'caller_id'
ga.addParam('sysparam_caller_id', g_form.getValue('caller_id'));

ga.getXML(displayUserDetails);

function displayUserDetails(response) {
var answer = response.responseXML.documentElement.getAttribute("answer");
alert(answer);

var result = JSON.parse(answer);
g_form.setValue('u_email', result.email);
g_form.setValue('u_firstname', result.firstName);
g_form.setValue('u_lastname', result.lastName);
}
}

var SI_ReturnUserDetails = Class.create();
SI_ReturnUserDetails.prototype = Object.extendsObject(AbstractAjaxProcessor, {
returnDetails: function () {
var sys_id = this.getParameter('sysparam_caller_id');
var gr = new GlideRecord('sys_user');
gr.get(sys_id);

var usrobj = {};
usrobj.email = gr.email.toString();
usrobj.firstName = gr.firstName.toString();
usrobj.lastName = gr.lastName.toString();

// Fix: Return the JSON object directly without stringifying it
return usrobj;
},
type: 'SI_ReturnUserDetails'
});

https://youtu.be/vKQTkKpc_co?si=1SwgU2l9lrMDECZQ

[Kongaleti Navee]

it showing as null in the alert message

[Kongaleti Navee]

can any one helpme in how to debug any script in servicenow