from sqlalchemy import Column, Integer, String
from ..core.database import Base

class Checkpoint(Base):
    __tablename__ = "checkpoint"

    id = Column(Integer, primary_key=True, index=True, autoincrement=True)
    aname = Column(String(100), nullable=False, comment="观察点名称")
    burial_date = Column(String(100), comment="埋设日期")
    section_id = Column(String(100), nullable=False, comment="所属断面id")
    point_id = Column(String(100), nullable=False, comment="观察点id")

        # 模型转字典
    def to_dict(self):
        """将模型实例转换为字典，支持 Pydantic 序列化"""
        return {
            column.name: getattr(self, column.name)
            for column in self.__table__.columns
        }