EasyUI DataGrid绑定嵌套的json数据

现有json数据如下：

{"total":2,"rows":
[{"BarrackGUID":"dc1be891-4489-4eb8-bb1d-ba1debd59b07","BarrackName":"屋舍一","BarrackNumber":"0001","BarrackArea":"100平米","Barrackcapacity":"20","BarrackPrice ":"3000","Barrackbirth":"2010年9月",
"company":{
"CompanyGUID":"aaa",
"CompanyName":"sdsdsdsd",
"CompanyCode":null,
"CompanyAddress":null
}},
{"BarrackGUID":"1d90143e-0434-4801-8192-923a9dfb06b6","BarrackName":"屋舍二","BarrackNumber":"0002","BarrackArea":"100平米","Barrackcapacity":"20","BarrackPrice":"3000","Barrackbirth":"2010年9月",
"company":null
}]}
可以看出在界面显示中希望显示 company.CompanyName, 绑定方法为：
html:

<th data-options="field:'rows.company.CompanyName',formatter:companyName,width:60,align:'center'">公司名称</th>
添加javasicript代码：
function companyName(value, rec) { return rec.company != null ? rec.company.CompanyName : ""; }

{ field: 'company', title: '公司', align: 'center',
formatter: function (value, row, index) {
if (row.company) {
return row.company.CompanyName;
} else {
return value;
}
}
},