def save_last_sync(self, ids, process):
        try:
            spec = {'_id': 'last_sync'}
            document = {'$set': {process: ids}}
            self.db.internal.update(spec, document, upsert=True)
        except Exception as e:
            raise DatabaseException(e)
def projectdir(self):
        """Absolute location of project directory: WM_PROJECT_DIR/"""
        return self.prefix  # <- install directly under prefix