def get_by_id(cls, id): return DBSession.query(cls).filter(cls.id == id).first()
def get_all(cls): return DBSession.query(Beer).all()
def delete_one(cls, id): r = cls.get_by_id(id) DBSession.delete(r) DBSession.flush()
def save(cls, name): beer = cls() beer.name = name DBSession.add(beer) DBSession.flush() return beer