Extjs如何在grid的每行数据后面添加删除的超链接来实现删除操作？

var colModel = new Ext.grid.ColumnModel(
        [  
        {header:"ID",dataIndex:"id",sortable:true,resizable: false},
        {header:"条件",dataIndex:"condition",sortable:true},  
        {header:"sql条件",dataIndex:"condition_sql",sortable:true,resizable: false} ,
        {header:"操作",width:150,dataIndex:''}
         
      ]  
    );
var store = new Ext.data.JsonStore({
    url:'xxx.report?reportId=condition_single',
     //proxy: httpProxy,
    root: 'view1.records',
    totalProperty: 'view1.total',
    fields:  [  
               'id','condition','condition_sql','operate'
           ] 
});以上是我的部分代码
我如何在 {header:"操作",width:150,dataIndex:''}这句话上添加删除的超链接来实现删除操作？