I want to create some record with Cassandra now() to keep unique identifiers (generation uuid is not good since can be duplicate).

How can I do it using object mapper.

I wrote such model:

class OwnerUnique(models.Model):
    __keyspace__ = 'training'
    __table_name__ = 'owner_unique'

    name = columns.Text(primary_key=True)
    owner_id = columns.UUID()

I try to use OwnerUnique.create(owner_id='now()') and owner_id = columns.UUID(deafult='now()').

Finnally I gave up and wrote raw query code – whatever maybe it is not need to write this code.
I think that setting UUID from now is normal practice so we do not need such flow.
How to do it in object mapper?

    @classmethod
    def create_unique_async(cls, name: str) -> ResponseFuture:
        query = '''
insert into training.owner_unique
    (name, owner_id) 
    values (?, now())
    if not exists'''

        params = {
            'name': name
        }

        current_connection: Connection = connection.get_connection('training')
        session = current_connection.session
        prepared_statement = cls._prepared_statements.get(query)
        if prepared_statement is None:
            prepared_statement: PreparedStatement = session.prepare(query)
            cls._prepared_statements[query] = prepared_statement

        response_future: ResponseFuture = session.execute_async(prepared_statement, params)

        return response_future

    @classmethod
    def create_unique(cls, name: str) -> ResultSet:
        response_future = cls.create_unique_async(name)
        result_set = response_future.result()

        return result_set