How do I use format without ParamQuery Pro

[miside]

I want use format, like formatter in easyui grid:
$('#dg').datagrid({
   columns:[[
      {field:'userId',title:'User', width:80,
         formatter: function(value,row,index){
            if (row.user){
               return row.user.name;
            } else {
               return value;
            }
         }
      }
   ]]
});
can you give me some advice to achieve this?

[paramvir]

you could use column.render callback.