class ActiveRecord::ConnectionAdapters::PostgreSQL::OID::Interval

def serialize(value)
  case value
  when ::ActiveSupport::Duration
    value.iso8601(precision: self.precision)
  when ::Numeric
    # Sometimes operations on Times returns just float number of seconds so we need to handle that.
    # Example: Time.current - (Time.current + 1.hour) # => -3600.000001776 (Float)
    ActiveSupport::Duration.build(value).iso8601(precision: self.precision)
  else
    super
  end
end