44 lines
1.6 KiB
Python
44 lines
1.6 KiB
Python
# -*- coding: utf-8 -*-
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"""本体类型模型
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本模块定义本体类型的数据模型。
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Classes:
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OntologyClass: 本体类型表模型
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"""
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import datetime
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import uuid
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from sqlalchemy import Column, String, DateTime, Text, ForeignKey, Boolean
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from sqlalchemy.dialects.postgresql import UUID
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from sqlalchemy.orm import relationship
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from app.db import Base
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class OntologyClass(Base):
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"""本体类型表 - 用于存储某个场景提取出来的本体类型信息"""
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__tablename__ = "ontology_class"
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# 主键
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class_id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4, index=True, comment="类型ID")
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# 类型信息
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class_name = Column(String(200), nullable=False, comment="类型名称")
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class_description = Column(Text, nullable=True, comment="类型描述")
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# 系统默认标识
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is_system_default = Column(Boolean, default=False, nullable=False, comment="是否为系统默认类型")
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# 外键：关联到本体场景
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scene_id = Column(UUID(as_uuid=True), ForeignKey("ontology_scene.scene_id", ondelete="CASCADE"), nullable=False, index=True, comment="所属场景ID")
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# 时间戳
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created_at = Column(DateTime, default=datetime.datetime.now, nullable=False, comment="创建时间")
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updated_at = Column(DateTime, default=datetime.datetime.now, onupdate=datetime.datetime.now, nullable=False, comment="更新时间")
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# 关系：类型属于某个场景
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scene = relationship("OntologyScene", back_populates="classes")
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def __repr__(self):
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return f"<OntologyClass(id={self.class_id}, name={self.class_name}, scene_id={self.scene_id})>"
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