active_model_extension_simplified.rb

module ActiveModel
  class Errors
    attr_accessor :error_code, :developer_message, :more_info

    def add(attribute, message = :invalid, options = {})
      options.each { |k,v| instance_variable_set("@#{k}", v) }

      message = normalize_message(attribute, message, options)
      
      if exception = options[:strict]
        exception = ActiveModel::StrictValidationFailed if exception == true
        raise exception, full_message(attribute, message)
      end

      self[attribute] << message
    end
  end
end