student_manage_system/stu_jiuye/model.py

from sqlalchemy import ForeignKey
from student_manage_system import students,classes
from stu_jiuye.database import DATETIME,Base,Column,Integer,String,DATE
from datetime import datetime



class Employments(Base):                                            #学生就业信息基类
    __tablename__ = 'Employments'                                   #表名
    id = Column(Integer                                         #主键，自增主键
                , primary_key=True
                , autoincrement=True
                # , ForeignKey='student.id'
                , comment='自增主键'
                )

    num  = Column(Integer
                    , ForeignKey('students.num')
                    )                                #学生姓名，冗余字段
    class_num  = Column(Integer
                         , ForeignKey('classes.id')
                            )                               #学生班级，冗余字段
    company_id = Column(Integer                                  #公司id，外键匹配公司表
                        , ForeignKey('Company.id')
                        , nullable=True

                        )

    employment_salary  = Column(Integer, nullable=True)                                    #薪资

    employment_open_time = Column(DATE, nullable=True)                 #就业开放时间

    offer_recived_time = Column(DATE, nullable=True)                            #offer下发时间

    create_time  = Column(DATETIME                          #创建数据时间
                          , default=datetime.now
                          )
    update_time  = Column(DATETIME                          #更新数据时间
                          , default=datetime.now
                          , onupdate=datetime.now
                          )
    is_deleted = Column(Integer, default=0)                     #是否为删除信息，默认为0

class Company(Base):                                                #公司信息基类
    __tablename__ = 'Company'                                       #表名
    id = Column(Integer
                , primary_key=True
                ,autoincrement=True
                )                                                   #主键id，自增主键
    employment_company = Column(String(50)                                #公司姓名
                      , nullable=False                                #非空约束
                      )
    address_id = Column(Integer                                 #地址id,匹配地址表
                        , ForeignKey('Address.id')                  #外键地址表id
                        , nullable=False                            #非空约束
                        )
    create_time = Column(DATETIME
                          , default=datetime.now
                          )
    update_time = Column(DATETIME
                          , default=datetime.now
                          , onupdate=datetime.now
                          )
    is_deleted = Column(Integer, default=0)

class Address(Base):
    __tablename__ = 'Address'
    id = Column(Integer                                         #地址id,自增主键
                , primary_key=True
                ,autoincrement=True
                )
    somewhere=Column(String(50)                                 #地址区域
                     , nullable=False
                     )
    create_time = Column(DATETIME
                          , default=datetime.now
                          )
    update_time = Column(DATETIME
                          , default=datetime.now
                          , onupdate=datetime.now
                          )
    is_deleted = Column(Integer, default=0)