extjs750 treepicker 绑定store异常
extjs750 treepicker 绑定store异常
路过君
发布于 2022-04-13 13:33:03
发布于 2022-04-13 13:33:03
文章被收录于专栏：路过君BLOG from CSDN
版本
extjs 7.x classic ux包
现象
使用treepicker绑定store时报错：
TypeError: Cannot read properties of null (reading ‘$eventOptions’) at constructor.addManagedListener (Observable.js?_dc=1641516240871:577) at constructor.aliasOneMember. [as mon] (Base.js?_dc=1641516240871:1175) at constructor.initComponent (TreePicker.js?_dc=1641516240875:67) at constructor (Component.js?_dc=1641516240871:2268)
原因
绑定在beforerender中初始化 treepicker时在initComponent中给store添加事件监听，此时绑定尚未初始化，store值为null,导致异常
解决
覆盖默认实现，改为在updateStore时添加事件监听
Ext.define('PSR.overrides.Ext.ux.TreePicker', {
override: 'Ext.ux.TreePicker',
initComponent: function() {
var me = this;
this.store = this.store || Ext.data.StoreManager.lookup('ext-empty-store');
me.callParent(arguments);
},
updateStore:function(store){
this.mon(store, {
scope: this,
load: this.onLoad,
update: this.onUpdate
});
},
});源码
node_modules/@sencha/ext-ux/classic/src/TreePicker.js
initComponent: function() {
var me = this;
me.callParent(arguments);
me.mon(me.store, {
scope: me,
load: me.onLoad,
update: me.onUpdate
});
},本文参与 腾讯云自媒体同步曝光计划，分享自作者个人站点/博客。
原始发表：2022/01/07 ，如有侵权请联系 cloudcommunity@tencent.com 删除
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