from sqlalchemy import (Column, Integer, String, Text,
                        BigInteger,ForeignKey,VARCHAR,DateTime
                        )
from sqlalchemy.dialects.mssql import TINYINT

from core.database import Base
from datetime import datetime


#班级老师关系表 class_teachers_info_detail 中间表 ORM 模型完整定义
#字段包括id,class_id,teacher_id,role,created_at,updated_at,is_deleted
class ClassTeachers(Base):
    __tablename__ = "class_teachers_info_detail"
    id = Column(
         Integer
        ,primary_key=True
        ,autoincrement=True
        ,comment='关系')
    class_id = Column(
         Integer
        ,ForeignKey('class_info_detail.id')
        ,nullable=False
        ,comment='关联 class_id'
    )
    teacher_id = Column(
         Integer
        ,ForeignKey("teacher_info_detail.id")
        ,nullable=False
        ,comment='关联 teacher_id'
    )
    role = Column(
         VARCHAR(30)
        ,nullable=False
        ,comment='老师在班级中的角色：head_teacher班主任 / lecturer授课老师 / assistant助教'
    )
    created_at = Column(
         DateTime
        ,nullable=False
        ,default=datetime.now()
        ,comment='创建时间'
    )
    updated_at = Column(
         DateTime
        ,nullable=False
        ,default=datetime.now()
        ,comment='更新时间'
    )
    is_deleted = Column(
        TINYINT
        ,nullable=False
        ,default=0
        ,comment='逻辑删除'
    )