python学习教程（九）sqlalchemy框架的modern映射

首先写一个modern.py文件，

 

from sqlalchemy.ext.declarative import declarative_base

from sqlalchemy import Column, Integer, String

from sqlalchemy.engine import create_engine



'''the connection to the database'''

engine = create_engine("mysql://root:1933jld1945js@localhost/test",isolation_level="READ UNCOMMITTED") 

'''the construct of the database table'''

Base = declarative_base()



class People():

    id = Column(Integer, primary_key=True)

    name = Column(String(16))

    gender = Column(String(16))

    age = Column(String(16))



class User(Base,People):

    __tablename__ = 'users'



    fullname = Column(String(16))

    password = Column(String(16))



class AdvancedUser(Base,People):

    __tablename__ = 'advanceduser'

    

    fullname = Column(String(16))

    password = Column(String(16))

    email = Column(String(16))

    

class Teacher(Base,People):

    __tablename__ = 'teacher'

    

    phone = Column(String(16))

    

Base.metadata.create_all(engine)

然后写一个control.py文件，内容如下：

 

 

from sqlalchemy.orm.session import sessionmaker

from modern import engine,User,AdvancedUser,Teacher



user = User()

user.name = 'username'

user.gender = 'male'

au = AdvancedUser()

au.name = 'auname'

au.gender = 'female'

teacher = Teacher()

teacher.name = 'wangdi'

teacher.gender = 'female'

teacher.phone = '15264397652'

Session = sessionmaker()

Session.configure(bind=engine)

session = Session()

session.add(user)

session.add(au)

session.add(teacher)

session.flush()

session.commit()

运行control.py可以测试代码。