Question

我有这样的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}]
                }]}]}

这样的模特。

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'
        }
    }
});

这样存储。

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，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'));
        });

我在树状面板中显示它，它工作正常。现在我想从商店访问每条记录。但我收到错误count()不是一个函数。在totalCount()，each()的情况下也是如此。我在这里错过了什么？如何从商店访问个人记录？

Answer 1

不幸的是，Ext.data.TreeStore不是Ext.data.Store的子类。它没有普通商店所做的所有方法。要访问数据，您必须使用getRootNode()并使用Ext.data.NodeInterface中定义的方法访问根节点。

NodeInterface提供cascadeBy()方法作为each()的等效方法，您必须使用它来编写自己的count()方法。

检索商店记录

1 个答案: