add aggregate to DataSource (after populating with data)

[Dr.YSG]

I have a VM has a DataSource in it.

var layerTable = new kendo.data.DataSource();

When new data arrives, I am able to populate the LayerTable with the data() function. But I also want to dynamically add in aggragates to this.

1.vm.SetLayers = function(values) {
2.    this.LayerTable.data(values);
3.    this.LayerTable.aggregate = [{ field: "FileCount", aggregate: "count" }];
4.    //this.trigger("change", { field: "LayerTable" });
5.};

I am finding that when I later try to get the aggregates() I get an empty object.

1.vm.LayerTable.aggregates();

[Daniel]

Hi,

You should use the aggregate method.

Regards,
Daniel
Telerik

[Dr.YSG]

Yes, that is a typo on my part.

I am now able to do what I thought was not possible.

1. Setup (at init time) the DataSource, with aggregates() but with no data
2. Receive JSON via XHR
3. do a DataSource.data() and supply the new data, and behold, the aggregates() values are filled in.