# model/stu_score_model.py
# 学生成绩表模型
from sqlalchemy import Column, Integer, String, Boolean, ForeignKey
from sqlalchemy.dialects.mysql import DECIMAL
from sqlalchemy.orm import relationship
from database import Base


class StuScore(Base):
    """
    学生成绩表模型
    对应 MySQL 中的 stu_score 表
    """
    __tablename__ = "stu_score"  # 表名

    # 字段定义
    id = Column(Integer, primary_key=True, nullable=False, autoincrement=True)  # 自增主键
    stu_id = Column(String(15), ForeignKey("stu_info.id"), nullable=False)      # 学生id，非空
    exam_attempt = Column(Integer, nullable=False, default=1)                   # 考试轮次，非空
    exam_score = Column(DECIMAL(5, 2), nullable=False)                          # 成绩，非空
    score_level = Column(String(10), nullable=False, default="普通")            # 成绩评级
    is_deleted = Column(Boolean, default=False, nullable=False)                 # 软删除: False-正常 True-已删除

    student = relationship("StuInfo", back_populates="score")

    def __repr__(self):
        return (f"<StuScore(stu_id={self.stu_id}, exam_attempt='{self.exam_attempt}'"
                f"exam_score={self.exam_score}, score_level='{self.score_level}'"
                f"is_deleted={self.is_deleted})>")