How to Make one of the related list tab Mandatory

[Hanook]

if user click "close case" button then

‘Type’ field is ‘sla’ and the ‘SLA Breach Code’ field is not empty(It'a choice field). If both conditions are met, it allows the form to be submitted. Otherwise, it displays an error message and prevents the form from being submitted. This ensures that the form can only be submitted when the ‘Type’ field is ‘sla’ and the ‘SLA Breach Code’ field is filled
I want code 
Thank You.

[Dr Atul G- LNG]

Hi @Hanook 

https://www.servicenow.com/community/itsm-forum/how-to-make-related-list-as-mandatory/m-p/827850

https://www.servicenow.com/community/itsm-forum/how-to-make-one-of-the-related-list-tab-mandatory/td...

[Saloni Suthar]

Please review https://www.servicenow.com/community/itsm-forum/mandatory-related-list/m-p/813518 for the solution. 

If my response helped you, please mark it as correct or helpful.

[Sohail Khilji]

Hi @Hanook ,

So here your trying to check if the fields are populated before closure of Case, which is a UI action.

You can append a code which checks if the fields are populated before closure. If found empty you can return back to current record with an error message. 

Please share the UI action code of close case to help you with code. I hope this helps..

[Hanook]

hello@sohial 

i tried with this code but its not working 

(function executeRule(current, previous /*null when async*/ ) {

        var gre = new GlideRecord('sn_customerservice_general_case');

        gre.addQuery('sys_id', current.sys_id);

        gre.query();

        gs.info('u_sla_breach_code Block 1');

        while (gre.next()) {

            var grew = new GlideRecord('task_sla');

            grew.addQuery('task', current.sys_id);

            grew.query();

            gs.info('u_sla_breach_code Block 2');

            while (grew.next()) {

                var slaBreachCode = grew.u_sla_breach_code;

                if (slaBreachCode == '') {

gs.info('u_sla_breach_code Block 3');

                    //g_form.setMandatory('u_sla_breach_code',true);

                    gs.addErrorMessage('Please select the SLA Breach Code for all related SLAs before closing .');

                    //action.setRedictURL(current);

                    current.setAbortAction(true);

                } else {

                    gs.clearErrorMessage();

                }}}

            })(current, previous);

let me know if any changes required
Thank You.