Unable to reset the edited field to its Original value

[nischal]

When i edit the end date field and set to the some new date, onSave it does not retain its original value using .set method,

Or any other field for that case, if i edit and onSave if i try set the old value It will not set , (will not reflect in the UI)

 

  $scope.ganttOptions = {

          dataSource: $scope.ganttDataSource,
          dependencies: $scope.ganttDataDependency,
          columns: [
            { field: 'id', title: "Task ID", width: 50, sortable: true},
            { field: "title", title: "Title", width: 100, sortable: true, editable: true },
            { field: "days", title: "Duration", type: "number", width: 50, editable: true},
            { field: 'start', title: "Start", sortable: true, format: "{0:MM/dd/yyyy}", width: 100, editable: true },
            { field: 'end', title: "End", sortable: true, format: "{0:MM/dd/yyyy}", width: 100, editable: true },             
            { field: 'percentComplete', title: '%', width: 50, editable: true},
          ],
           views: [
                    "day",
                    "week",
                    { type: "month", selected: true },
                ],
          add: onAdd,
          edit: onEdit,
          cancel: onCancel,
          save: onSave, 
     };    

//Scenario 1

function onSave(e){  

     if(e.values.end != undefined){

          //Few code here, based on conditions and new values that i get

          //In the end i set the end date to its original value 

         //This does not work

          e.task.set("end", e.task.end);    //e.task.set("end", new Date("03/16/2016"));

     }

} 

//Scenario 2

function onSave(e){

   if(e.value.end != undefined){

     //This way it works, cus edited field is end date and some value is set to days field. 

      e.task.set("days", 12);

   }

}

[Dimitar Terziev]

Hi,

The reason for the experienced behavior is the following. When a task is updated the values from the event argument are applied to the task fields, so in order to restore a particular field then the e.values object should be altered as shown below:

function onSave(e) {
    if (e.values.end != undefined) {
        e.values.end = e.task.end;
    }
}

Regards,
Dimitar Terziev
Telerik