new (DataMapper::Validate::LengthValidator)

    # File lib/dm-validations/validators/length_validator.rb, line 15
          def initialize(field_name, options)
            super

            @equal = options[:is]      || options[:equals]
            @range = options[:within]  || options[:in]
            @min   = options[:minimum] || options[:min]
            @max   = options[:maximum] || options[:max]

            if @min && @max
              @range ||= @min..@max
            end
          end