slightly clunky way and perhaps not ideal, but it works

navigate to the history entry. the sysid corresponds to the id of the record changed

var grSHS=new GlideRecord('sys_history_set');//--record history

if (grSHS.get('id', '8cf2d354db733f403c304662159619a2')){

var grSHL=new GlideRecord('sys_history_line');//--history

grSHL.addQuery('field', 'assignment_group'); //--or whatever field has changed

grSHL.addQuery('set', grSHS.sys_id);

grSHL.addQuery('oldISNOTEMPTYnewISNOTEMPTY');

grSHL.orderBy('sys_created_on');

gs.print(grSHL.old_value);

//--or in a script include:

gs.print(si.getAuditHistory_previousValue('8cf2d354db733f403c304662159619a2', 'assignment_group'));

getAuditHistory_previousValue: function(SYSID, FIELD_CHANGED){

//--purpose: retrieve the audit history from somewhere where previous. cannot be used, such as a UI Action

var grSHS=new GlideRecord('sys_history_set');//--record history

if (grSHS.get('id', SYSID)){ //--sys_id of the record that was changed

var grSHL=new GlideRecord('sys_history_line');//--history

grSHL.addQuery('field', FIELD_CHANGED);//--name of the field that was changed, e.g. 'assignment_group'

grSHL.addQuery('set', grSHS.sys_id);

grSHL.addQuery('oldISNOTEMPTYnewISNOTEMPTY');

grSHL.orderByDesc('sys_created_on');

//--return the sys id and display value, comma-separated

sReturn=+grSHL.old_value';'+grSHL.old;

Haven't tested these all recently within global/local scopes, so feel free to have a play! option 1 use an encoded query embedded in the GlideRecord , e.g. var grProf = new GlideRecord ( 'x_cls_clear_skye_i_profile' ); grProf . addQuery ( 'status=1^ owner=NULL ' ); grProf . query (); even better use the glideRecord addNotNullQuery or addNullQuery option 2 JSUtil.nil / notNil (this might be the most powerful. See this link ) example: if ( current . operation () == 'insert' && JSUtil . notNil ( current . parent ) && ! current . work_effort . nil ()) option 3 there might be times when you need to get inside the GlideRecord and perform the check there, for example if the code goes down 2 optional routes depending on null / not null can use gs.nil : var grAppr = new GlideRecord ( 'sysapproval_approver' ); var grUser = new GlideRecord ( 'sys_user' ); if ( grUser . get ( 'sys_id' , current . approver )){

Classic UI : var sURL_editparam = gs . action . getGlideURI (). getMap (). get ( ' sysparm_aparameter ' ); if ( sURL_editparam == 'true' ) { gs . addInfoMessage ( 'parameter passed ); } Portal : var sURL_editparam = $sp . getParameter ( " sysparm_aparameter " ); if ( sURL_editparam == 'true' ) { gs . addInfoMessage ( 'parameter passed ); }

Call a script include to apply a reference qualifier on a catalog item variable: - variable reference qualifier dependent on another variable selection, in this case a variable referencing sys_user (requested_for) On the catalog item form. variable name to apply ref qual filter : retail_equipment variable reference qualifier (on cmdb table ): javascript : new refqual_functions (). lostStolen_getAssignedCIs (); client-callable script include ( refqual_functions) function : lostStolen_getAssignedCIs : function (){ //--called from variable set client script, for lost/stolen request (service catalog) gs . log ( current . variables . requested_for , 'retail_lostStolen_getAssignedCIs' ); return ( 'install_statusNOT IN8,7owned_by=' + current . variables . requested_for ); //owned_by=1269b79937f1060041c5616043990e41install_statusNOT IN8,7 },