from sqlalchemy import Column, Integer, String, Float, DateTime, ForeignKey
from sqlalchemy.sql import text
from database import Base

class ProductPackaging(Base):
    __tablename__ = "product_packaging"
    
    id = Column(Integer, primary_key=True, index=True, comment='主键 ID')
    product_number = Column(String(11), nullable=False, server_default="", index=True, comment='产品货号')
    model = Column(String(50), nullable=False, server_default="", comment='型号')
    length = Column(Float, nullable=False, server_default="0", comment='长度 (cm)')
    width = Column(Float, nullable=False, server_default="0", comment='宽度 (cm)')
    height = Column(Float, nullable=False, server_default="0", comment='高度 (cm)')
    volume = Column(Float, nullable=False, server_default="0", comment='体积 (cm³)')
    weight = Column(Float, nullable=False, server_default="0", comment='重量 (g)')
    company_code = Column(String(50), nullable=False, server_default="", index=True, comment='公司编码，用于数据隔离')
    created_at = Column(DateTime(timezone=True), nullable=False, server_default=text('CURRENT_TIMESTAMP'), comment='创建时间')
    updated_at = Column(DateTime(timezone=True), nullable=False, server_default=text('CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP'), comment='更新时间')