from sqlalchemy import Integer, Column, DateTime, Integer, Numeric, String

from util.database import Base


class Grade(Base):
    """对应 Excel Sheet：成绩表。"""

    __tablename__ = "wl_grade"

    id = Column(Integer, primary_key=True, autoincrement=True, comment="id")
    student_number = Column(String(50), comment="学生编号")
    course_number = Column(String(50), comment="课程编号")
    exam_sequence = Column(Integer, comment="考试序次")
    score = Column(Numeric(5, 2), comment="分数")
    created_at = Column(DateTime, comment="数据创建时间")
    updated_at = Column(DateTime, comment="数据更新时间")
    is_deleted = Column(default=False, nullable=False, comment="逻辑删除字段")