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我有一个这样的 JSON。

{
    "children":[
        {"name": "subdivision1","id": "subdiv1","type": "subdiv","children":[
            {"name": "Scheme1","id": "scheme1","type": "scheme","children":[
                {"name": "Nathuji","id": "nathuji","type": "datalogger","leaf":true},
                { "name": "Tarsang","id": "tarsang","type": "datalogger","leaf":true},
                { "name": "Mithapur","id": "mithapur","type": "datalogger","leaf":true},
                { "name": "Samali","id": "samali","type": "datalogger","leaf":true}]},
            {"name": "Scheme2","id": "scheme2","type": "scheme","children":[
                { "name": "Bhunidra","belongsto": "scheme2","id": "bhunidra","type": "datalogger","leaf":true},
                { "name": "Chhogala","belongsto": "scheme2","id": "chhogala","type": "datalogger","leaf":true}]
                }]},
        {"name": "subdivision2","id": "subdiv2","type": "subdiv","children":[
            {"name": "Scheme3","id": "scheme3","type": "scheme","children":[
                { "name": "Thana Savli","belongsto": "scheme3","id": "thanasavli","type": "datalogger","leaf":true},
                { "name": "Padardi","belongsto": "scheme3","id": "padardi","type": "datalogger","leaf":true}]
                }]}]}

像这样的模型。

Ext.define('DemoApp.model.dataloggerhierarchymodel',{
    extend: 'Ext.data.Model',
    fields: ['name','id','type'],
    proxy: {
        type: 'ajax',
        api: {
            read: 'data/allschemes.json'
        },
        reader: {
            type: 'json',
            root: 'children'
        }
    }
});

像这样存放。

Ext.define('DemoApp.store.dataloggerhierarchystore',{
    extend: 'Ext.data.TreeStore',
    model: 'DemoApp.model.dataloggerhierarchymodel',
    autoLoad: true,
    listeners: {
        load:function(){
            console.log('Datalogger Tree store loaded');
        }
    },
    root: {
        expanded: true
    }
});

我在控制器中访问它，例如，

var schemesStore = this.getDataloggerhierarchystoreStore();
        if(schemesStore == null || schemesStore == undefined){
            console.log('Store Undefined');
        }
        for(var i = 0; i< schemesStore.count();i++)
            {
                console.log('Record - '+schemesStore[i].get('id'));
            };

        schemesStore.each(function(currentRecord){
            console.log(currentRecord.get('id'));
        });

我在树形面板中显示它，它工作正常。现在我想从商店访问每条记录。但我得到的错误count()不是函数。在 , 的情况下也是totalCount()如此each()。我在这里想念什么？如何从商店访问个人记录？

4

1 回答 1

2

不幸的是，Ext.data.TreeStore它不是Ext.data.Store. 它没有普通商店的所有方法。为了访问数据，您必须通过使用getRootNode()和使用定义的方法访问根节点Ext.data.NodeInterface。

NodeInterface 提供了cascadeBy()等效于 的方法each()，您必须使用它来编写自己的count()方法。

于 2012-09-10T13:57:19.900 回答