如何从Store.sync()上的服务器获取响应消息

问题描述：

我有一家想与服务器进行 sync()的商店.

I have a store which I'd like to sync() with server.

Store.sync()方法具有成功和 failure 属性功能，它们具有 Ext.data.Batch 和 options 作为参数.

Store.sync() method have success and failure property-functions, they have Ext.data.Batch and options as parameters.

如果我从服务器收到这样的答复:

If I get such response from server:

{
  success: false,
  msg: "test error!"
}

失败方法被调用.

如何从 failure 方法中访问响应 msg 属性?

How to access response msg property from within failure method?

答

    store.sync({
        failure: function(batch, options) {
            alert(batch.proxy.getReader().jsonData.msg);
        }
    });