@classmethod
def get_one(cls, strategy):
    """Retrieve a single item from DynamoDB according to strategy.

        See :ref:`doc_get_one`

        :return: Instance of ``cls`` - The fetched item
        """
    cls._schema()
    keys = cls._parse_one_strategy(strategy, False)
    response = cls.table().get_item(Key=keys)
    if not response or 'Item' not in response:
        return None
    return cls._from_db_dict(response['Item'])
