有一些需求如:
1.一個文件管理的Grid,要求排序的時候,文件夾永遠在頂部
2.一個顯示成功率的Grid,要求成功數+失敗數=0的數據,不參與排序,永遠在底部
ExtJs本身并沒有暴露這個接口,所以我們只能自己重寫,如下代碼:
1 var store = new Ext.data.JsonStore({
2 root:'data',
3 fields:[
4 'name',
5 {name:'sucCount',type:'int'},
6 {name:'failCount',type:'int'},
7 {name:'sucRate',type:'float'},
8 {name:'isValidateTest',type:'boolean'},
9 {name:'statType',type:'int'},
10 'testLogIds','bsc','msc','sgsn'
11 ],
12 sortInfo:{field: 'sucRate', direction: 'ASC'},
13 //排序規(guī)則
14 sortData:function(f, direction){
15 direction = direction || 'ASC';
16 var dir = direction == 'ASC' ? 1 : -1;
17 var st = this.fields.get(f).sortType;
18 //關鍵地方,重寫排序排序規(guī)則
19 var fn = function(r1, r2){
20 if(!r1.get('isValidateTest')||!r2.get('isValidateTest')){
21 //無效數據永遠在下面
22 return !r1.get('isValidateTest') ? dir : -dir;
23 }else{
24 var v1 = st(r1.data[f]), v2 = st(r2.data[f]);
25 return v1 > v2 ? 1 : (v1 < v2 ? -1 : 0);
26 }
27 };
28 this.data.sort(direction, fn);
29 if(this.snapshot && this.snapshot != this.data){
30 this.snapshot.sort(direction, fn);
31 }
32 }
33 });