gistfile1.js

var wi = workflowContext.getWorkItem();
var toField = arguments.getAsString("toField");

function log(msg) {
    print("popelakm_log : " + msg + "\n")
        // tail -f /var/log/polarion/polarion.log | grep popelakm_log
}



if (wi.getCustomField(toField) == null) {
    var user = wi.getDataSvc().searchInstances("User", "id:" + wi.getDataSvc().getSecurityService().getCurrentUser(), "id").get(0)
    var type = wi.getCustomFieldPrototype(toField).getType()
    var enumFactory = wi.getDataSvc().getObjectEnumerationForEnumId(type, wi.getContextId())
    
    wi.setCustomField(toField, enumFactory.wrapObject(user))
}