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- # -*- coding: utf-8 -*-
- """题目-知识点映射（支持一题多知识点）"""
- from datetime import datetime
- from sqlalchemy import Column, Integer, DateTime, ForeignKey
- from backend.database import Base
- class QuestionKnowledgePoint(Base):
- __tablename__ = "question_knowledge_points"
- id = Column(Integer, primary_key=True, index=True)
- # 暂时关联到 questions 表，后续可扩展到更通用的题库表
- question_id = Column(Integer, ForeignKey("questions.id"), nullable=False, index=True)
- # 对应 schema.sql 中的 knowledge_points.id
- knowledge_point_id = Column(Integer, nullable=False, index=True)
- # 该知识点在本题中的权重（1=次要，2=一般，3=核心）
- weight = Column(Integer, default=1)
- created_at = Column(DateTime, default=datetime.utcnow)
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