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锁定老帖子 主题：修改ExtJs store默认的排序行为
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发表时间：2009-12-17
最后修改：2009-12-17
ExtJs2.0的时候，普通的Ext.data.SimpleStore的对数据的排序行为是区分大小写的。 比如有如下几个name,
1,Ashely, 2,amonda 3,Cary 经过ExtJs SimpleStore排序后，出现的顺序如下： 1,Ashely, 2,Cary 3,amonda 因为ExtJs内部是按照ASCII排序的，而在ASCII中，大写字母总在小写字母之前。 需要修改行为，使得排序不分区大小写。下面是我的实现，不通用，但是在这个例子是跑的通。 例子是ExtJs官方的的array_grid的例子,http://www.extjs.com/deploy/dev/examples/grid/array-grid.html 下面是我修改过的代码，array-grid.js
/*
* Ext JS Library 2.2.1
* Copyright(c) 2006-2009, Ext JS, LLC.
* licensing@extjs.com
*
* http://extjs.com/license
*/
Ext.onReady(function(){
// NOTE: This is an example showing simple state management. During development,
// it is generally best to disable state management as dynamically-generated ids
// can change across page loads, leading to unpredictable results. The developer
// should ensure that stable state ids are set for stateful components in real apps.
Ext.state.Manager.setProvider(new Ext.state.CookieProvider());
//覆盖的排序在这里起作用。
Ext.data.CustomSortStore = Ext.extend(Ext.data.SimpleStore,{
sortData : function(f, direction){
direction = direction || 'ASC';
var st = this.fields.get(f).sortType;
var fn = function(r1, r2 , store){
var v1 = st(r1.data[f]), v2 = st(r2.data[f]);
if(typeof(v1) == 'string' && typeof(v2) == 'string'){
//去掉大小写限制
var al = v1.toLowerCase(), bl= v2.toLowerCase();
return al > bl ? 1 : (al < bl ? -1 : 0);
}else{
return v1 > v2 ? 1 : (v1 < v2 ? -1 : 0);
}
};
this.data.sort(direction, fn);
if(this.snapshot && this.snapshot != this.data){
this.snapshot.sort(direction, fn);
}
}
});
var myData = [
['3m Co',71.72,0.02,0.03,'9/1 12:00am'],
['citigroup, Inc.',49.37,0.02,0.04,'9/1 12:00am'],
['Altria Group Inc',83.81,0.28,0.34,'9/1 12:00am'],
['American Express Company',52.55,0.01,0.02,'9/1 12:00am'],
['American International Group, Inc.',64.13,0.31,0.49,'9/1 12:00am'],
['AT&T Inc.',31.61,-0.48,-1.54,'9/1 12:00am'],
['Boeing Co.',75.43,0.53,0.71,'9/1 12:00am'],
['Caterpillar Inc.',67.27,0.92,1.39,'9/1 12:00am'],
['E.I. du Pont de Nemours and Company',40.48,0.51,1.28,'9/1 12:00am'],
['alcoa Inc',29.01,0.42,1.47,'9/1 12:00am'],
['Exxon Mobil Corp',68.1,-0.43,-0.64,'9/1 12:00am'],
['General Electric Company',34.14,-0.08,-0.23,'9/1 12:00am'],
['General Motors Corporation',30.27,1.09,3.74,'9/1 12:00am'],
['Hewlett-Packard Co.',36.53,-0.03,-0.08,'9/1 12:00am'],
['Honeywell Intl Inc',38.77,0.05,0.13,'9/1 12:00am'],
['Intel Corporation',19.88,0.31,1.58,'9/1 12:00am'],
['International Business Machines',81.41,0.44,0.54,'9/1 12:00am'],
['Johnson & Johnson',64.72,0.06,0.09,'9/1 12:00am'],
['JP Morgan & Chase & Co',45.73,0.07,0.15,'9/1 12:00am'],
['mcDonald\'s Corporation',36.76,0.86,2.40,'9/1 12:00am'],
['Merck & Co., Inc.',40.96,0.41,1.01,'9/1 12:00am'],
['Microsoft Corporation',25.84,0.14,0.54,'9/1 12:00am'],
['Pfizer Inc',27.96,0.4,1.45,'9/1 12:00am'],
['The Coca-Cola Company',45.07,0.26,0.58,'9/1 12:00am'],
['The Home Depot, Inc.',34.64,0.35,1.02,'9/1 12:00am'],
['The Procter & Gamble Company',61.91,0.01,0.02,'9/1 12:00am'],
['United Technologies Corporation',63.26,0.55,0.88,'9/1 12:00am'],
['Verizon Communications',35.57,0.39,1.11,'9/1 12:00am'],
['Wal-Mart Stores, Inc.',45.45,0.73,1.63,'9/1 12:00am']
];
// example of custom renderer function
function change(val){
if(val > 0){
return '<span style="color:green;">' + val + '</span>';
}else if(val < 0){
return '<span style="color:red;">' + val + '</span>';
}
return val;
}
// example of custom renderer function
function pctChange(val){
if(val > 0){
return '<span style="color:green;">' + val + '%</span>';
}else if(val < 0){
return '<span style="color:red;">' + val + '%</span>';
}
return val;
}
// create the data store
// 这里使用我们自定义的Store
var store = new Ext.data.CustomSortStore({
fields: [
{name: 'company'},
{name: 'price', type: 'float'},
{name: 'change', type: 'float'},
{name: 'pctChange', type: 'float'},
{name: 'lastChange', type: 'date', dateFormat: 'n/j h:ia'}
]
});
store.loadData(myData);
// create the Grid
var grid = new Ext.grid.GridPanel({
store: store,
columns: [
{id:'company',header: "Company", width: 160, sortable: true, dataIndex: 'company'},
{header: "Price", width: 75, sortable: true, renderer: 'usMoney', dataIndex: 'price'},
{header: "Change", width: 75, sortable: true, renderer: change, dataIndex: 'change'},
{header: "% Change", width: 75, sortable: true, renderer: pctChange, dataIndex: 'pctChange'},
{header: "Last Updated", width: 85, sortable: true, renderer: Ext.util.Format.dateRenderer('m/d/Y'), dataIndex: 'lastChange'}
],
stripeRows: true,
autoExpandColumn: 'company',
height:350,
width:600,
title:'Array Grid'
});
grid.render('grid-example');
});
排序结果： 
---------------- 这里的办法可以实现修改排序行为,但是却不通用。我想要的是一种可以覆盖Ext.data.Store的行为的方式，可以方便在new instance的时候注入sort function.我有试着这样去写：
//省略其他
Ext.apply(Ext.data.Store,{
sortFn : undefined,
sortData : function(f, direction){
direction = direction || 'ASC';
var st = this.fields.get(f).sortType;
var fn = function(r1, r2 , store){
var v1 = st(r1.data[f]), v2 = st(r2.data[f]);
if(this.sortFn && typeof(this.sortFn) == 'function'){
return this.sortFn(v1,v2);
}else{
return v1 > v2 ? 1 : (v1 < v2 ? -1 : 0);
}
};
this.data.sort(direction, fn);
if(this.snapshot && this.snapshot != this.data){
this.snapshot.sort(direction, fn);
}
}
});
// 省略其他
// 构造store的时候传入排序函数：
var store = new Ext.data.CustomSortStore({
fields: [
{name: 'company'},
{name: 'price', type: 'float'},
{name: 'change', type: 'float'},
{name: 'pctChange', type: 'float'},
{name: 'lastChange', type: 'date', dateFormat: 'n/j h:ia'}
],
sortFn : function(v1,v2){
if(typeof(v1) == 'string' && typeof(v2) == 'string'){
var v1l = v1.toLowerCase(),v2l = v2.toLowerCase();
return return v1l > v2l ? 1 : (v1l < v2l ? -1 : 0);
}else{
return v1 > v2 ? 1 : (v1 < v2 ? -1 : 0);
}
}
});
但是这样做不起任何作用，实际排序的时候走的还是Ext.data.Store的默认的sortData方法，并不能覆盖。 我想问问，怎么样才能实现我想的那种效果？
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发表时间：2009-12-17
补充一条，我用的ExtJs2.2
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