ExtJS4如何从JSON设置TreePanels根节点

Question

我想使用ExtJS4创建TreePanel.所以我将JSON发送到具有以下格式的代理阅读器

{
    "text": "en",
    "children": {
        "text": "/",
        "children": [{
                "text": "/page",
                "children": [{
                        "text": "/page/new",
                        "children": [],
                        "leaf": true,
                        "expanded": false
                    },
                    {
                        "text": "/page/remove",
                        "children": [],
                        "leaf": true,
                        "expanded": false
                    }
                ],
                "leaf": false,
                "expanded": false
            },
            {
                "text": "/home",
                "children": [],
                "leaf": true,
                "expanded": false
            }
        ],
        "leaf": false,
        "expanded": true
    }
}

如果我希望en节点作为我的根节点,如何配置我的商店.

Ext.define('Example.store.WebItems', {
    extend: 'Ext.data.TreeStore',

    model: 'Example.model.Item',

    proxy: {
        type: 'ajax',
        api: {
            read: 'some/url',
        },
        reader: {
            type: 'json',
            root: 'children' // Is this correct?
        }
    },
    root: // What should I write here?
});

当我定义TreeStoreroot时root: 'My Root'它会添加新的root,但是我想使用root定义的JSON.

所以我的问题是:

1. 如何使用JSON中的根节点而不是手动定义它？
2. 我是否还必须在代理阅读器和TreeStore中定义根节点？

Answer 1

必须有回应root.

例如:

{
     MyRoot: {
         "text": "en",
         "children": {
             "text": "/",
             "children": [{
                 "text": "/page",
                 "children": [{
                     "text": "/page/new",
                     "children": [],
                     "leaf": true,
                     "expanded": false
                 }, {
                     "text": "/page/remove",
                     "children": [],
                     "leaf": true,
                     "expanded": false
                 }],
                 "leaf": false,
                 "expanded": false
             }, {
                 "text": "/home",
                 "children": [],
                 "leaf": true,
                 "expanded": false
             }],
             "leaf": false,
             "expanded": true
         }
     }
 }

在这个例子中root是MyRoot.现在你必须"告诉"读者你的root是MyRoot:

        // ...
        reader: {
            type: 'json',
            root: 'MyRoot'
        }
    },
    //root: this config is not needed now
});