Create a custom button and a custom field - clicking on the button should populate the custom field

[KarangulaB]

I have a requirement to Create a custom button and a custom field.

clicking on the button should populate the custom field with the count of incidents assigned to the given assignment group

Help me with this.

[J Siva]

Hi @KarangulaB 
Try the below solution.

1. Custom string field:

2. Custom UI action:

var records = new GlideRecord('incident');
records.addQuery('assignment_group', current.assignment_group);
records.addQuery('state', '!=', 7); // 7 is the state for 'Closed'
records.query();
current.u_incident_count = records.getRowCount();
current.update();
action.setRedirectURL(current);

Modify the script as required.

Regards,
Siva