Begin by replacing the code that creates the Edit option in the Student controller listing function with the code from listing 21.

首先用清单21中的代码代替用来创建Student控制器的listing函数内的Edit选项的那些代码。

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The third command, jruby script\generate scaffold Wish Editor, scaffolds the basic list, create, edit, and delete actions in the editor controller for the wish objects stored in the database.

第三个命令 jruby script\generate scaffold Wish Editor 提供基本列表和针对存储在数据库中的 wish 对象的编辑器控制器操作（创建、编辑和删除）。

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For example, to enable product editing support we can implement the HTTP-GET version of our "edit" action method on our Products controller like below and then invoke the "Add View" command.

例如，要支持产品编辑，我们可以象下面这样在Products控制器上实现“Edit”action方法的HTTP - GET版本，然后调用“添加视图”命令。

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While the Xbox 360 requires a quick trip to the dashboard to edit things like resolution and audio output, the Echo is easily configured without a gaming controller, thanks to a user interface that has the same look and feel as the rest of Media Center.

ENGADGET: Ceton Echo Windows Media Center Extender review HD