'Create an instance of this model in the database.
Takes the model column values as keyword arguments. Setting a value to
`None` is equivalent to running a CQL `DELETE` on that column.
Returns the instance.'

@classmethod
def create(cls, **kwargs):

    extra_columns = (set(kwargs.keys()) - set(cls._columns.keys()))
    if extra_columns:
        raise ValidationError('Incorrect    columns    passed:    {0}'.format(extra_columns))
    return cls.objects.create(**kwargs)
