extjs中的grid中的数据加载问题！

{
header : 'psnId',
hidden:true,
dataIndex : 'psnId'
}，
{
header : '部门/单位',
width:120,
align: 'left',
sortable: true,
//dataIndex : 1=='DEP_001'?'psnDeptName':'psnOrgName'
}

基本代码如上，怎样才能在不同的情况下，一种情况显示部门名称，一种情况显示机构名称。求大神指点一下！！！

renderer根据当前行其他值返回对应的数据
http://docs.sencha.com/extjs/4.1.3/#!/api/Ext.grid.column.Column-cfg-renderer

 renderer : Function/String
A renderer is an 'interceptor' method which can be used to transform data (value, appearance, etc.) before it is rendered. Example:

{
    renderer: function(value){
        if (value === 1) {
            return '1 person';
        }
        return value + ' people';
    }
}
Additionally a string naming an Ext.util.Format method can be passed:

{
    renderer: 'uppercase'
}
Defaults to: false

Available since: 3.4.0

value : Object
The data value for the current cell
metaData : Object
A collection of metadata about the current cell; can be used or modified by the renderer. Recognized properties are: tdCls, tdAttr, and style.
record : Ext.data.Model
The record for the current row
rowIndex : Number
The index of the current row
colIndex : Number
The index of the current column
store : Ext.data.Store
The data store
view : Ext.view.View
The current view
return : String
The HTML string to be rendered.