The ClientID concern is for facilitating a passthrough of client IDs, useful for reconciling created records with their non-ID'd client counterpart.

client_id.rb

module ClientID
  extend ActiveSupport::Concern

  included do
    attr_writer :cid
    after_commit :_save_cid, on: :create, if: -> { @cid.present? }
  end

  def cid
    Thread.current[_cid_key]
  end

  private

  def _save_cid
    Thread.current[_cid_key] = @cid
  end

  def _cid_key
    "cid:#{self.class.to_s.tableize}:#{id}"
  end

end