how to access datasource child.
<div id="a" data-role="grid"                        data-toolbar="['excel']"                        data-excel='{fileName: "ok.xlsx", proxyURL: "http://demos.telerik.com/kendo-ui/service/export",filterable: true}'                        data-editable="false"                        data-selectable="true"                        data-filterable="true"                        data-columnMenu="true"                        data-groupable="true"                        data-pageable='{ "pageSize": 10}'                        data-reorderable="true"                        data-resizable="true"                        data-sortable="true"                        data-height="550"                        data-no-records= "true"                        data-detail-template="templateSubGrid"                        data-columns="[                                    { 'field': 'a.nome','title':'nome'},                                    { 'field': 'a.stato','title':'stato'}                                     ]"                        data-bind="source: GridSource,events:{detailInit: onDetailInit}">        </div>        <script id="templateSubGrid" type="text/x-kendo-template">            <h4>ciao ciao </h4>            <div id="Subgrid"                data-role="grid"                data-bind="source: GridSource.b"                data-columns="[                       { 'field': 'name','title':' name'},                    { 'field': 'company','title':'company'},                ]">            </div>        </script>JS:
this.vm = kendo.observable({            Grid:Source:[],            onDetailInit:function(e){                   var dataItem = $("#Subgrid").data("kendoGrid").dataItem(e.masterRow);                kendo.bind("#Subgrid", dataItem);            }        });        kendo.bind($("#m"), this.vm);//GridSource is filled with the ajax function
The response is like this:
[     {        "a":{           "idName":1,         "name":"abbi",      },      "b":[           {              "idSurname":2,            "surname":"24353453252",         },         {             "idSurname":3,            "surname":"fghgfhjk",         },         {              "idSurname":4,            "surname":"24ssdfds3252",         }      ]   }]'b' must be the data source of the detailtemplate grid.