数据库凭据存储优惠卷

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

Base = declarative_base()

class Coupon(Base):
    __tablename__ = 'coupons'
    id = Column(Integer, primary_key=True)
    code = Column(String, unique=True)
    discount = Column(Float)
    type = Column(String)

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

# 添加新优惠券
new_coupon = Coupon(code='SAVE10', discount=10.0, type='discount')
session.add(new_coupon)
session.commit()

# 查询优惠券
coupon = session.query(Coupon).filter_by(code='SAVE10').first()
print(f"Coupon Code: {coupon.code}, Discount: {coupon.discount}, Type: {coupon.type}")