You might want to try putting the true in quotes, like so:

var new_row = skip_day_model.createRow({ additionalConditions: [ {field:‘is_Test__c’,value:‘true’} ], 

Moshe, for me, at least, that does not work
Mock = function(){           this.skip_day = function (args_obj){
                var year = args_obj.year;
                var month = args_obj.month;
                var day = args_obj.day;
                var skip_date = year + ‘-’ + month + ‘-’ + day;
               var skip_days = skuid.model.getModel(‘Cal_Skip_Day’);console.log(skip_days);
               var new_row = skip_days.createRow({ additionalConditions: �
                        {field: ‘Skip_Day_Date__c’, value:skip_date},
                        {field:‘is_Test__c’,value:‘true’}
                    ],
                    doAppend: true
                });
               
                console.log(new_row);
                skip_days.save();
                 return new_row;
            };
this code creates a row, but the field ‘is_Test__c’ is not given a value

Mock = function(){           this.skip_day = function (args_obj){
                var year = args_obj.year;
                var month = args_obj.month;
                var day = args_obj.day;
                var skip_date = year + ‘-’ + month + ‘-’ + day;
               var skip_days = skuid.model.getModel(‘Cal_Skip_Day’);console.log(skip_days);
               var new_row = skip_days.createRow({ additionalConditions: e
                        {field: ‘Skip_Day_Date__c’, value:skip_date},
                        {field:‘is_Test__c’,value:true}
                    ],
                    doAppend: true
                });
                skip_days.updateRow(new_row,{is_Test__c:true});
                console.log(new_row);
                skip_days.save();
                 return new_row;
            };

this code creates a row, and the is_Test__c field is created and has the value true

I’m running in to the same problem here: { field: ‘Kiosk_Registration__c’, value: true} I’ve tried: true ‘true’ 1 Nothing seems to work.

Figured it out - I forgot to add the boolean field to the Model I was trying to create a row on. Fixed the issue.