Rails custom serializer for newline-separated values

newline-serializer.rb

# Reads newline-separated text from the database as an array
# Note that when you present this field for content authors to edit
# you will need to join the value into a newline separated text.
class NewlineSerializer
  def self.dump(value)
    return value if value.is_a?(String)

    return value.join("\r\n") if value.is_a?(Array)
  end

  def self.load(value)
    return nil if value.blank?

    return value.split("\r\n").map(&:strip).reject(&:blank?)
  end
end