class Length < Grape::Validations::Base

  def validate_param!(attr_name, params)
    return true if params[attr_name].blank?
    unless params[attr_name].length <= @option
      raise Grape::Exceptions::Validation, 
        params: [@scope.full_name(attr_name)],
        message: I18n.t(
          "grape.errors.format",
          attributes: attr_name,
          message: I18n.t(
            "grape.errors.messages.too_long",count: @option,
            default: "must be at the most #{@option} characters long"
            )
          )
    end
  end

end