Update the object directly.

        .. code-block:: python

            DBSession.sacrud(Users)._add(UserObj, {'name': 'Gennady'})

def _add(self, obj, data, **kwargs):
        """ Update the object directly.

        .. code-block:: python

            DBSession.sacrud(Users)._add(UserObj, {'name': 'Gennady'})
        """
        if isinstance(obj, sqlalchemy.orm.query.Query):
            obj = obj.one()
        obj = self.preprocessing(obj=obj or self.table)\
            .add(self.session, data, self.table)
        self.session.add(obj)
        if kwargs.get('commit', self.commit) is True:
            try:
                self.session.commit()
            except AssertionError:
                transaction.commit()
        return obj