使用sqlalchemy 之一

此代码实现了最基本的创建数据库表和对象与数据表之间的映射关系建立

 

import sqlalchemy
print sqlalchemy.__version__
from sqlalchemy import create_engine
engine=create_engine('sqlite:///:memory:',echo=True)
from sqlalchemy import Table,Column,Integer,String,MetaData,ForeignKey
metadata=MetaData()
users_table=Table('users',metadata,
    Column('id',Integer,primary_key=True),
    Column('name',String(50)),
    Column('fullname',String),
    Column('password',String),
)
metadata.create_all(engine)
class User(object):
    def __init__(self,name,fullname,password):
        self.name=name
        self.fullname=fullname
        self.password=password
    def __repr__(self):
        return ""%(self.name,self.fullname,self.password)
from sqlalchemy.orm import mapper
mapper(User,users_table)
ed_user=User('crackpot','Crackpot','password')
print 'username:',ed_user.name
print 'fullname:',ed_user.fullname
print 'password:',ed_user.password
print 'id:',str(ed_user.id)