Shortcut for customizing ActiveAdmin columns

I've been working with ActiveAdmin lately in Rails, and sometimes need to customize the index view of a model without rewriting all the attributes that I don't want to change.

I want to exclude a few columns simply without writing a bunch of ActiveAdmin dsl.

The code below does this simply and is easily embeddable into the ActiveAdmin dsl.

Colleague is my model name below. Replace it with yours.

The code below goes in the /app/admin/colleague.rb

ActiveAdmin.register Colleague do

  index do
    excluded = ["bio", "phone", "created_at"]
     (Colleague.column_names - excluded).each do |c|
      column c.to_sym
    end
  end

end