SlickGrid行设定

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我现在要用SlickGrid做一个表，现在的json结构如下：[{"name":"笔2","box":{"name":"文具盒"}},{"name":"笔1","box":{"name":"文具盒"}},{"name":"笔3","box":{"name":"文具盒"}}]，像这样添加columns.push({id: "pen_box", name: "铅笔盒", field: "box.name"});是无效的，我怎么才能显示box中的name属性，求silckGrid大神指教