from sqlalchemy import Column, Integer, String, Date, ForeignKey
from sqlalchemy.dialects.mysql import DATETIME
from datetime import datetime
from database import Base




class ClassInfo(Base):
    __tablename__ = 'classes_management'

    id = Column(Integer
                ,primary_key=True
                ,autoincrement=True
                ,comment='班级id主键'
                )
    num = Column(String(50)
                 ,nullable=False
                 ,comment='班级编号'
                 )
    name = Column(String(50)
                        ,nullable=False
                        ,comment='班级名称'
                        )
    head_teacher_id = Column(Integer
                            ,ForeignKey('teacher.id')
                            ,nullable=False
                            ,comment='班主任编号'
                            )

    coach_teacher_id = Column(Integer
                              ,ForeignKey('teacher.id')
                              ,nullable=False
                              ,comment='授课老师编号'
                              )
    tutor_teacher_id = Column(Integer
                              ,ForeignKey('teacher.id')
                              ,nullable=False
                              ,comment='助教老师编号'
                              )
    # class_teacher = Column(String(50)
    #                        ,nullable=False
    #                        ,comment='班主任'
    #                        )
    # class_lecturer = Column(String(50)
    #                         ,nullable=False
    #                         ,comment='授课老师'
    #                         )
    class_start_time = Column(Date
                              ,nullable=False
                              ,comment='开班日期'
                              )
    class_end_time = Column(Date
                            ,nullable=False
                            ,comment='结课日期'
                            )
    is_delete = Column(Integer
                       ,default=0
                       ,comment='逻辑删除 0未删除 1已删除'
                       )
    create_time = Column(DATETIME
                         ,default=datetime.now
                         ,comment='记录创建时间'
                         )
    update_time = Column(DATETIME
                         ,default=datetime.now
                         ,onupdate=datetime.now
                         ,comment='记录更新时间'
                         )