Django Rest Framework Unix Timestamp Field

unixdatetimefield.py

class UnixTimestampField(serializers.FloatField):
    """
    Stores Django datetimes as a Unix timestamp.
    
    Thank you to Laur Ivan for the inspiration:
    https://www.laurivan.com/timestamp-to-datetime-serializer-field-for-drf/
    """

    def to_internal_value(self, value):
        """
        Convert a float of a Unix timestamp to an aware datetime
        """
        # Convert given value to float, or fail
        timestamp = super().to_internal_value(value)

        # Convert to aware datetime

        # If a timezone is given, fromtimestamp will always create a datetime for the
        # same point in time. The only difference is the associated timezone.
        # But that is slightly surprising, so to make it least surprising, we're
        # returning an aware datetime based on UTC.
        return datetime.fromtimestamp(timestamp, tz=timezone.utc)

    def to_representation(self, value):
        """
        Convert a datetime to a float of an Unix timestamp
        Any timezone information is handled correctly by timestamp()
        https://docs.python.org/3/library/datetime.html#datetime.datetime.timestamp
        """
        return value.timestamp()