Active Admin：如何设置页面标题？

这看起来应该相对简单，但我在寻找答案时遇到了一些麻烦：

如何在 ActiveAdmin 中设置页面标题？

合并答案并添加一点：

这大部分都在维基百科上的这个页面 https://github.com/gregbell/active_admin/wiki/Set-page-title（或者我很快就会把它放在那里）。

在为 activeadmin 注册模型的文件（例如 app/admin/user.rb）中，您可以

ActiveAdmin.register User do
  # a simple string
  index :title => "Here's a list of users" do
    ...
  end

  # using a method called on the instance of the model
  show :title => :name do
    ...
  end

  # more flexibly using information from the model instance
  show :title => proc {|user| "Details for "+user.name } do
    ...
  end

  # for new, edit, and delete you have to do it differently
  controller do
    def edit
      # use resource.some_method to access information about what you're editing
      @page_title = "Hey, edit this user called "+resource.name
    end
  end
end