TreeGrid：设置数据根没有效果

Question

我正在尝试设置一个 TreeGrid，我的数据对象如下所示：

{
    "code": "success",
    "data": {
        "text": ".",
        "children": [
            {
                "clientname": "Market",
                "contact": "OpenX Market Advertiser",
                "email": "[email protected]",

我需要告诉 Ext 它应该使用 data 作为根元素：

var store = Ext.create('Ext.data.TreeStore', {
    model: 'Task',
    proxy: {
        type: 'ajax',
        url: 'http://localhost/rocketads/trunk/advertisers/index/stats:true/',
        reader:{
            type:'json',
            root:'data'
        }
    },
});

尽管我成功了，但这对我不起作用与普通商店一起使用。

Answer 1

由于您已经使用 root: 'data' 设置了阅读器，因此您必须在 json 中将 'children' 替换为 'data'：

{
    "code": "success",
    "data": {
        "text": ".",
        "data": [ // << not "children"
            {

Answer 2

您还可以使用这个：

        reader: {
        type: 'json',
        // See http://stackoverflow.com/questions/9159627/extjs-loading-tree-from-json-file-using-mvc
        // http://stackoverflow.com/questions/6263380/extjs4-json-treestore
        root: function(o) {
            if (o.data) {
                return o.data;
            } else {
                return o.children;
            }
        }
    }, 

Answer 3

不幸的是，对于 TreeStore，无论您使用什么作为根，也将用作每个后续级别的根，因此它可能会找到根节点，然后找不到它的 data 属性。将顶级属性从数据更改为子属性，或者将子属性的每个实例更改为数据。

Answer 4

我在 ExtJS 4.2 中遇到同样的问题
我尝试通过以下代码解决这个问题。

Ext.define('XZSoftware.view.sysconfig.permission.PermissionWindow', {
    extend: 'Ext.window.Window',
    itemid: "sysconfig-permission-window",
    vierConfig: { loadMask: true },
    layout:
    {
        type: "fit"
    },
    minWidth: 400,
    minHeight: 300,
    tree: null,
    treeStore: null,
    initComponent: function () {
        var me = this;
        Ext.log("initComponent()", me);

        me.treeStore = Ext.create("Ext.data.TreeStore", {
            proxy: {
                type: "ajax",
                actionMethods: { read: "POST" },
                reader: {
                    type: "json",
                    root: "data"
                },
                url: '/permissiontree_load.xzsoftware?o=AAAAACB'
            },
            root: {
                text: "Premission Tree",
                expanded: true
            }
        });

        me.tree = Ext.create("Ext.tree.Panel", {
            rootVisible: false,
            store: me.treeStore
        });

        me.items = [
            me.tree
        ];

        this.callParent(arguments);
    },

    Version: "1.0.0.0"

});

JSON 将从 HTTP 请求中响应。

{
    "total": 17,
    "data": [{
        "data": [{
            "data": [],
            "expanded": true,
            "leaf": "true",
            "checked": false,
            "text": "HSBC"
        }, {
            "data": [],
            "expanded": true,
            "leaf": "true",
            "checked": false,
            "text": "All IDoc"
        }, {
            "data": [],
            "expanded": true,
            "leaf": "true",
            "checked": false,
            "text": "ProCRM"
        }],
        "expanded": true,
        "leaf": "false",
        "checked": false,
        "text": "Application Portal"
    }, {
        "data": [{
            "data": [],
            "expanded": true,
            "leaf": "true",
            "checked": false,
            "text": "Order List"
        }, {
            "data": [{
                "data": [],
                "expanded": true,
                "leaf": "true",
                "checked": false,
                "text": "Report by monthly total"
            }],
            "expanded": true,
            "leaf": "true",
            "checked": false,
            "text": "Order Report"
        }, {
            "data": [],
            "expanded": true,
            "leaf": "true",
            "checked": false,
            "text": "Search"
        }],
        "expanded": true,
        "leaf": "false",
        "checked": false,
        "text": "CNMOT - OMS"
    }, {
        "data": [{
            "data": [],
            "expanded": true,
            "leaf": "true",
            "checked": false,
            "text": "Company"
        }, {
            "data": [],
            "expanded": true,
            "leaf": "true",
            "checked": false,
            "text": "Funcation Setting"
        }, {
            "data": [],
            "expanded": true,
            "leaf": "true",
            "checked": false,
            "text": "Menu Setting"
        }, {
            "data": [],
            "expanded": true,
            "leaf": "true",
            "checked": false,
            "text": "Page Setting"
        }, {
            "data": [],
            "expanded": true,
            "leaf": "true",
            "checked": false,
            "text": "Permission"
        }, {
            "data": [],
            "expanded": true,
            "leaf": "true",
            "checked": false,
            "text": "Roles"
        }, {
            "data": [],
            "expanded": true,
            "leaf": "true",
            "checked": false,
            "text": "Users"
        }],
        "expanded": true,
        "leaf": "false",
        "checked": false,
        "text": "System Setting"
    }],
    "success": true,
    "message": "Success"
}

笔记：
1.应该在TreeStore中设置根配置。
2.JSON中的children字段需要更改为store代理中的根配置。在我的示例中，“孩子”设置为“数据”。