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- # -*- coding: utf-8 -*-
- """学生-知识点掌握度与薄弱权重"""
- from datetime import datetime
- from sqlalchemy import Column, Integer, DateTime, ForeignKey, UniqueConstraint
- from backend.database import Base
- class StudentKnowledgeMastery(Base):
- __tablename__ = "student_knowledge_mastery"
- __table_args__ = (
- UniqueConstraint("user_id", "knowledge_point_id", name="uk_user_kp"),
- )
- id = Column(Integer, primary_key=True, index=True)
- user_id = Column(Integer, ForeignKey("users.id"), nullable=False, index=True)
- knowledge_point_id = Column(Integer, nullable=False, index=True)
- # 掌握度 0-100
- mastery_score = Column(Integer, nullable=False, default=0)
- # 原始统计
- correct_count = Column(Integer, default=0)
- wrong_count = Column(Integer, default=0)
- # 薄弱权重：越大表示越薄弱，用于推荐排序
- weakness_weight = Column(Integer, default=0)
- last_practiced_at = Column(DateTime, nullable=True)
- created_at = Column(DateTime, default=datetime.utcnow)
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