游戏数据库存储双十二促销活动

from sqlalchemy import create_engine, Column, Integer, String, DateTime
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker
from datetime import datetime

Base = declarative_base()

class Promotion(Base):
    __tablename__ = 'promotions'
    id = Column(Integer, primary_key=True)
    name = Column(String)
    description = Column(String)
    start_date = Column(DateTime)
    end_date = Column(DateTime)

engine = create_engine('sqlite:///game_promotions.db')
Base.metadata.create_all(engine)
Session = sessionmaker(bind=engine)
session = Session()

# 添加新的促销活动
new_promotion = Promotion(
    name="双十二大促",
    description="全场道具8折优惠",
    start_date=datetime(2023, 12, 12, 0, 0),
    end_date=datetime(2023, 12, 12, 23, 59)
)
session.add(new_promotion)
session.commit()

# 查询当前有效的促销活动
current_promotions = session.query(Promotion).filter(
    Promotion.start_date <= datetime.now(),
    Promotion.end_date >= datetime.now()
).all()

for promo in current_promotions:
    print(f"活动名称: {promo.name}, 描述: {promo.description}")