Adding row after grid sort results in undefined

[Ryan]

If I add a grid row and save it, it works. If I have sorted the column first and then add a row upon saving it shows the data as "undefined". Is there something wrong with my grid configuration?

Here's a link to an example: http://trykendoui.telerik.com/OnUm

[Alexander Popov]

Hello Ryan,

This happens because the range field is undefined. I would recommend adding a check in the template function, for example: 

template : function (data) {
    if (data.range) {
        return data.dirtyFields && data.dirtyFields['range'] ? '<span class="k-dirty"></span> ' + data.range : data.range;
    } else {
        return "";
    }
}

Regards,
Alexander Popov
Telerik