How to get the Current logdin user using both client side and server side??

[SandeepKSingh]

I have a requirnmnet , on Incident Form caller should be autopopulated based on current logdin user in ServiceNow.

Can anyone help with code ?

[Ravi Gaurav · Accepted solution]

Yes you can use g_user API in client script and gs.getUser() will work 
g_form.setValue('caller_id', g_user.userID);

[Sandeep Rajput · Accepted solution]

@SandeepKSingh You can create an onLoad client script on the incident form to populate logged in user on the incident form.

function onLoad() {
    // Check if the form is new (to avoid changing the caller on existing incidents)
    if (g_form.isNewRecord()) {
        // Set the 'Caller' field to the logged-in user
        g_form.setValue('caller_id', g_user.userID);
    }
}

Please mark the solution helpful and accepted solution if it manages to address your question.

[Ravi Gaurav · Accepted solution]

As you requested :-

PFB full script :-

function onLoad() {

if (g_form.isNewRecord()) {

if (!g_form.getValue('caller_id')) {

g_form.setValue('caller_id', g_user.userID);
}
}
}

[Ravi Gaurav · Accepted solution]

Yes you can use g_user API in client script and gs.getUser() will work 
g_form.setValue('caller_id', g_user.userID);

[Sandeep Rajput · Accepted solution]

@SandeepKSingh You can create an onLoad client script on the incident form to populate logged in user on the incident form.

function onLoad() {
    // Check if the form is new (to avoid changing the caller on existing incidents)
    if (g_form.isNewRecord()) {
        // Set the 'Caller' field to the logged-in user
        g_form.setValue('caller_id', g_user.userID);
    }
}

Please mark the solution helpful and accepted solution if it manages to address your question.

[Sandeep Rajput]

@SandeepKSingh My response addresses your question in an efficient way. It should also be an accepted solution.

[Soni Tushar]

Hello @SandeepKSingh ,

Use this script to auto-populate the Caller field:

function onLoad() {

    // Check if the form is new (Caller field should be empty)
    if (g_form.isNewRecord()) {
        // Set the Caller field with the sys_id of the logged-in user
        g_form.setValue('caller_id', g_user.userID);
    }
}

Alternative Approach :

Set a Default Value for the Caller Field -- At the dictionary level have the default value as javascript:gs.getUserID()

If you found my rsponse helpful, please consider marking it as "Helpful" or "Accept Solution." Thank you!