Netzke列锁定

Question

我在Ext JS文档中看到了一个功能 - http://dev.sencha.com/deploy/ext-4.0.1/examples/grid/locking-grid.html。我们可以通过根据文档设置“锁定”选项来锁定列，但是当我在Netzke Grid中执行此操作时，网格消失。有没有具体的方法来实现这一目标。下面给出了示例代码，

def configure(c)
    super
    c.model = "Product"
    c.title = "Product List"
    c.columns = [       
          {
          :name => :name,
          :text => "Name",
          :read_only => true,
          :locked => true
          },
          {
          :name => :price,
          :text => "Price"
          },
          {
          :name => :date,
          :text => "Date"
          }
    ]
end