gistfile1.py

    @db_session(retry=3)
    def create_or_update_model(self, model, criteria, data):
        """
            Creates a model with specified data if one doesn't match criteria, or updates if matches.
        """
        # exists() was being annoying, work that out later
        if model.select().filter(**criteria).count():
            m = model.get(**criteria)
            m.set(**data)
        else:
            data.update(criteria)
            m = model(**data)
        return m