Ruby: casting to boolean value

boolean_value.rb

class BooleanValue
  # https://github.com/rails/rails/blob/master/activemodel/lib/active_model/type/boolean.rb
  FALSE_VALUES = [
    false, 0,
    "0", :"0",
    "f", :f,
    "F", :F,
    "false", :false,
    "FALSE", :FALSE,
    "off", :off,
    "OFF", :OFF,
  ].to_set.freeze

  class << self
    def cast(value)
      Rails.present? ? with_rails(value) : without_rails(value)
    end

    private

      def with_rails(value)
        major, minor, _patch = Rails.version.split('.').map(&:to_i)
        case major
        # Rails 5
        when 5, 6
          ActiveRecord::Type::Boolean.new.cast(value)
        # Rails 4
        when 4
          # Rails < 4.2
          if minor < 2
            ActiveRecord::ConnectionAdapters::Column.value_to_boolean(value)
          # Rails >= 4.2
          else
            ActiveRecord::Type::Boolean.new.type_cast_from_user(value)
          end
        # Other
        else
          without_rails value
        end
      end

      # as defined in Rails 5:
      # everything, except empty string and FALSE_VALUES considered as TRUE
      def without_rails(value)
        if value == ""
          nil
        else
          !FALSE_VALUES.include?(value)
        end
      end
  end
end