how to update variable inside callback function

[Akki1]

HI, I have defined variable outside and i want to update the value inside callback . How can i do it.

I have tried to explain my scenario using an example.

var name='abc';

if(user!=' '){

var x = g_form.getReference('user', callFunction);

function callFunction(x){

var managerName=x.manager;

name=name+"_" + managerName;

}

}

alert(name);     // I'm not getting the updated name it still shows abc 

//The goal I want to achieve is the variable to update the value and use it outside callFunction

[Ankur Bawiskar]

Hi,

then why not send the variable value to the ajax function; perform the logic there and return the final value along with other values to be returned.

Regards
Ankur

[Akki1]

Yea this was the last option i was looking for

[Ankur Bawiskar]

Hi,

I did find few OOB client scripts where the variable declared outside is accessible inside the callback but it was using GlideAjax

This is one example:

Name: Calc duration from Approved End Date

Script:

function onChange(control, oldValue, newValue, isLoading, isTemplate) {
    var APPROVED_START_DATE = "approved_start_date",
        DURATION = "duration",
        APPROVED_END_DATE = "approved_end_date";

    // TODO: This file mimics the behavior of 'Calculate Duration From End Date' need to move the 
    // common code to a single client script.
    calculateDurationOnChangeOfApprovedEndDate();

    function calculateDurationOnChangeOfApprovedEndDate() {
        if (isLoading || newValue === '' || g_scratchpad.flag || !g_form.isNewRecord() || oldValue == newValue || g_scratchpad.prevApprovedEndDate == newValue) {
            
            g_scratchpad.flag = false;
            return;
        }
        g_scratchpad.prevApprovedEndDate = newValue;
        var apprStartDate = g_form.getValue(APPROVED_START_DATE);
        if (!apprStartDate) {
            g_form.showFieldMsg(APPROVED_START_DATE, getMessage('Approved start date shouldn\'t be nil'), 'error');
            return;
        }

        var pmClientDateAndDurationHandler = new PmClientDateAndDurationHandler(g_form);
        if (!pmClientDateAndDurationHandler.isValidClientDate(APPROVED_START_DATE))
            return false;
        if (!pmClientDateAndDurationHandler.isValidClientDate(APPROVED_END_DATE))
            return false;
        calculateDuration(apprStartDate);
    }

    function calculateDuration(apprStartDate) {
        var ga = new GlideAjax('AjaxProjectTaskUtil');
        ga.addParam('sysparm_start_date', apprStartDate);
        ga.addParam('sysparm_end_date', g_form.getValue(APPROVED_END_DATE));
        if (g_scratchpad.nested) {
            ga.addParam('sysparm_name', 'getDuration');
            ga.addParam('sysparm_sys_id', g_scratchpad.projectTaskSysId);
        } else {
            var schedule;
            if (g_form.hasField('schedule'))
                schedule = g_form.getValue('schedule');
            else
                schedule = g_scratchpad.schedule;
            ga.addParam('sysparm_name', 'getDurationPerSchedule');
            ga.addParam('sysparm_sys_id', schedule);
        }
        ga.getXML(handleResponse);
    }

    function handleResponse(response) {
        if (response && response.responseXML) {
            var result = response.responseXML.getElementsByTagName("result");
            if (result) {
                result = result[0];
                var status = result.getAttribute("status");
                var answer = result.getAttribute("answer");
                var message = result.getAttribute('message');
                if (status == 'error') {
                    pmClientDateAndDurationHandler.showErrorMessage(APPROVED_END_DATE, message);
                } else {
                    g_scratchpad.flag = true; //This flag is also used in other client scripts to avoid re-triggering 
                    g_form.setValue(DURATION, answer, answer); // this comes from the above variable
                }
            }
        }
    }

}

Regards
Ankur

[Akki1]

It is accessible inside but the problem is if we update the value inside callback and then use that variable outside it will not show updated value.

[Ankur Bawiskar]

Hi,

I believe that's expected since you are doing the calculation inside the callback.

Try to search any OOB script for this

But why to use that variable outside the callback when the entire calculation can be done within callback method?

Regards
Ankur