module for 'moderatable' models in rails

Publishable.rb

module Concerns
  module Models
    module Publishable
      extend ActiveSupport::Concern

      included do
        REJECTED = -1
        PENDING = 0
        PUBLISHED = 1

        validates :status, numericality: {
          less_than_or_equal_to: 1,
          greater_than_or_equal_to: -1
        }

        default_scope where(status: PUBLISHED)
        scope :pending_review, -> { where(status: PENDING) }
        scope :rejected, -> { where(status: REJECTED) }
        scope :published, -> { where(status: PUBLISHED) }

        def public?
          status == PUBLISHED
        end
      end
    end
  end
end