Rails: Share enum declaration values between models

You can use a concern.

module HasTransparency
  extend ActiveSupport::Concern
  included do
    enum transparency: %w(anonymous private public)
  end
end

Then include it in your models:

class Category < ActiveRecord::Base
  include HasTransparency

  ....
end

An alternative to "the right way" of using a concern or module, you can just make reference to another class enum. It worked perfectly for me:

enum same_values_than_other: SomeOtherClass.my_awesome_enum

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