Rails3 Active Admin：第一次单击Shipments标签时如何仅显示打开状态记录？

问题描述

我正在使用ActiveAdmin。我有状态为（字符串形式）打开和关闭的货件清单。当用户单击货件选项卡时，我只想显示未清货件。我怎样才能做到这一点？当然，用户以后可以使用过滤器选择查看已关闭的货件。但是我希望默认值最初只显示未清装运。

I'm using ActiveAdmin. I have a list of Shipments with status (as a string) of Open and Closed. When the user clicks on the Shipments tab, I want to display only the Open shipments. How can I do that? Of course, the user could later choose to see the Closed shipments by using the filter. But I want the default to initially only show the Open shipments.

推荐答案

模型范围：

#app/models/shipments.rb
  scope :opened, where(:status => "Open")
  scope :closed, where(:status => "Closed")

activeadmin资源中的范围，一个标记为默认范围：

scopes in the activeadmin resource, one marked as default:

#app/admin/shipments.rb
  scope :opened, :default => :true
  scope :closed

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