def to_database(self, value):
        if value is None and self.has_default:
            return self.get_default()
        return value
Return a generator of databases
dataset/ETHPy150Open datastax/python-driver/cassandra/cqlengine/columns.py/Column.to_database--crossover with--dataset/ETHPy150Open openstack/python-openstacksdk/openstack/database/v1/_proxy.py/Proxy.databases