class ActiveJob::Serializers::DurationSerializer

def deserialize(hash)
  value = hash["value"]
  parts = Arguments.deserialize(hash["parts"])
  # `parts` is originally a hash, but will have been flattened to an array by Arguments.serialize
  klass.new(value, parts.to_h)
end

def klass
  ActiveSupport::Duration
end

def serialize(duration)
  # Ideally duration.parts would be wrapped in an array before passing to Arguments.serialize,
  # but we continue passing the bare hash for backwards compatibility:
  super("value" => duration.value, "parts" => Arguments.serialize(duration.parts))
end