我正在尝试显示一个 extjs-4 树,后备存储中充满了来自 ajax 调用的 json(这似乎是成功的),但树没有显示。相反,我得到一个错误:
TypeError: t is null ext-all.js (line 38)
编辑:我现在正在使用ext-dev.js
它给出错误:
TypeError: el is null
在该行:
el = el.dom || Ext.getDom(el);
除了第 38 行,我想知道我是否在我的 javascript 中犯了任何明显的错误......
Ext.require([
'Ext.tree.*',
'Ext.data.*'
]);
Ext.onReady(function() {
Ext.define('pools', {
extend: 'Ext.data.Model',
fields: ['text', 'id']
});
var store = Ext.create('Ext.data.TreeStore', {
autoLoad: true,
model: 'pools',
proxy: {
type: 'ajax',
url: 'get_all',
reader: 'json'
}
});
store.load();
// create the Tree
var tree = Ext.create('Ext.tree.Panel', {
store: store,
rootVisible: false,
viewConfig: {
plugins: [{
ptype: 'treeviewdragdrop'
}]
},
height: 350,
width: 400,
title: 'Directory Listing',
renderTo: 'viewer',
collapsible: true
});
});
成功返回的json对象为:
{"text": ".", "children": [{"text": "pool1", "id": "pool1", "children": [{"text": "pool1/vol01", "leaf": "true", "id": "pool1/vol01"}]}, {"text": "pool5", "id": "pool5", "children": [{"text": "pool5/vol", "leaf": "true", "id": "pool5/vol"}, {"text": "pool5/vol2", "leaf": "true", "id": "pool5/vol2"}]}]}
使用谷歌浏览器的堆栈跟踪显示:
Uncaught TypeError: Cannot read property 'dom' of null ext-dev.js:20437
Ext.define.doInsert ext-dev.js:20437
Ext.define.append ext-dev.js:17115
Ext.define.render Renderable.js:783
Ext.define.constructor AbstractComponent.js:1126
Base.implement.callParent ext-dev.js:6271
Ext.define.constructor Component.js:336
Base.implement.callParent ext-dev.js:6271
Ext.define.constructor Panel.js:144
constructor ext-dev.js:7459
(anonymous function)
Ext.ClassManager.instantiate ext-dev.js:8199
(anonymous function) ext-dev.js:3015
(anonymous function) viewer.js:26 <----------- from my javascript above (var tree=...)
(anonymous function) ext-dev.js:14498
Ext.util.Event.Ext.extend.fire ext-dev.js:14658
Ext.apply.readyEvent.event.fire ext-dev.js:14901
Ext.apply.fireReadyEvent ext-dev.js:14999
Ext.apply.onDocumentReady ext-dev.js:15023
fn ext-dev.js:10056
Ext.apply.triggerReady ext-dev.js:10042
Ext.apply.refreshQueue ext-dev.js:9540
Ext.apply.refreshQueue ext-dev.js:9541
Ext.apply.refreshQueue ext-dev.js:9541
Ext.apply.refreshQueue ext-dev.js:9541
Ext.apply.refreshQueue ext-dev.js:9541
Ext.apply.onFileLoaded ext-dev.js:9947
(anonymous function) ext-dev.js:3001
onLoadFn
我该如何解决这个问题?