from sqlalchemy import Column, Integer, Float, ForeignKey, String
from sqlalchemy.orm import relationship

from database import Base

class Score(Base):
    __tablename__ = "wl_score"

    # 和 wl_emp 一样：学号直接做主键，同时做外键指向学生表的业务学号，
    # 不再用内部主键 stu_id。长度跟 Student.stu_no 保持一致。
    stu_no = Column(String(20), ForeignKey('wl_student.stu_no'), primary_key=True, comment="学号")
    exam_order = Column(Integer, primary_key=True, comment="考核序次")
    score = Column(Float, nullable=False, comment="成绩")

    student=relationship("Student",back_populates="scores")