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kendo grid does not populating after re-read data

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I use angular kendo grid.

Here is options:

$scope.relatedCasesOptions = {
        dataSource: newkendo.data.DataSource({
            type: 'json',
            transport: {
                read: function(opt) {
                    if($scope.item)
                        opt.success([{ CaseNumber: "CaseNumber"}]);
                    opt.success([]);
                }
            },
        columns: [
            { field: "CaseNumber", title: "№ дела"}
        ]
    }

 

In other place, when particular event get rose, I call

varcases = $('#docRelatedCaseGrid').data("kendoGrid");
cases.dataSource.read();
cases.refresh();
 

There set breakpoint on  opt.success([{ CaseNumber: "CaseNumber" }]) row and it's possible to observe that read function was really called.
But table are not refreshed and grid still remains empty.


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