class Customer < ActiveRecord::Base
  has_many :settings, inverse_of: :customer, dependent: :destroy do
    def prepare_setting(api_setting)
      find_or_initialize_by(api_id: api_setting[:api_id]).tap do |api_set|
        api_set.description = api_setting[:description]
        # Some other stuff here
      end
    end
  end

  def prepare_settings
    API.settings.each do |api_setting|
      settings.prepare_setting(api_setting)
    end
  end
end