from datetime import datetime

from sqlalchemy import Integer, Column, DateTime, String

from util.database import Base


class Relation(Base):
    """对应 Excel Sheet：关联关系表。"""

    __tablename__ = "wl_relation"

    id = Column(Integer, primary_key=True, autoincrement=True, comment="id")
    source_id = Column(String(50), comment="关系来源标识")
    destination_id = Column(Integer, comment="关系目标标识")
    relation_type = Column(String(50), comment="关系类型")
    created_at = Column(DateTime, comment="数据创建时间")
    updated_at = Column(DateTime, comment="数据更新时间")
    is_deleted = Column(default=False, nullable=False, comment="逻辑删除字段")