from sqlalchemy import *
from core.database import Base
from datetime import datetime,date
class Score(Base):
    __tablename__ = "score_info_detail"
    id = Column(Integer
                , primary_key=True
                ,autoincrement=True
                ,comment="成绩表序号，自增主键"
                )
    student_id = Column(Integer
                        ,ForeignKey("student_info_detail.id")
                        ,nullable=False
                        ,comment="学生学号"
                        )
    score = Column(DECIMAL(4,1)
                   ,CheckConstraint("score between 0 and 100")
                   )
    exam_seq= Column(Integer
                     , nullable=False
                     ,comment="考试序次")
    __table_args__ = (
        UniqueConstraint("student_id"
                         , "exam_seq"
                         , name="uk_student_exam_seq"),
    )#学生id和学生姓名应为联合唯一，即一个学生一次考试只能有一个分数
    exam_date=Column(Date
                     ,default=date.today
                     ,comment="考试日期"
                     )
    created_at=Column(DateTime
                      ,default=datetime.now
                      ,comment="创建时间"
                      )
    updated_at=Column(DateTime
                      ,default=datetime.now
                      ,onupdate=datetime.now
                      ,comment="更新时间"
                      )
    remark=Column(String(225)
                  ,comment="备注说明"
                  )
    is_deleted=Column(Integer
                      ,default=0
                      ,comment="逻辑删除标记：未删除0，已删除1"
                      )