SQLAlchemy连接数据库并在django admin显示

SQLAlchemy 0.7     postgersql  9.0

SQLAlchemy连接数据库有两种方法，一种是classic，一种是modern

1，modern方法

 from sqlalchemy import create_engine
 from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy import Column, Integer, String
 from sqlalchemy.orm import sessionmaker
 from sqlalchemy import Sequence

 #绑定数据库
 engine = create_engine('postgres://postgres:1@localhost/fy', echo=False)
 Base = declarative_base()

 class User(Base):
     __tablename__ = 'users'
     id = Column(Integer, Sequence('user_id_seq'), primary_key=True)
     name = Column(String)
     fullname = Column(String)
     password = Column(String)

     def __init__(self, name, fullname, password):
         self.name = name
         self.fullname = fullname
         self.password = password

     def __repr__(self):
         return "<User('%s','%s', '%s')>" % (self.name, self.fullname, self.password)

 Base.metadata.create_all(engine)

 #session会话
 Session = sessionmaker(bind=engine)
 Session = sessionmaker()
 Session.configure(bind=engine)
 session = Session()

 user_name = raw_input('name >')
 user_fullname = raw_input('fullname >')
 user_password = raw_input('password >')

 ed_user = User(user_name, user_fullname, user_password)
 session.add(ed_user)

 #提交
 session.commit()
 session.close()

2. classic方法 也可以用session方法增加数据

 from sqlalchemy import Table, MetaData, Column, Integer, String
 from sqlalchemy.orm import mapper
 from sqlalchemy import create_engine
 from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy import Column, Integer, String
 from sqlalchemy.orm import sessionmaker
 from sqlalchemy import Sequence

 engine = create_engine('postgres://postgres:1@localhost/fy', echo=False)
 metadata = MetaData()

 user = Table('users', metadata,
             Column('id', Integer, Sequence('user_id_seq'), primary_key=True),
             Column('name', String(50)),
             Column('fullname', String(50)),
             Column('password', String(12))
         ) 

 metadata.create_all(engine, checkfirst=True)
 conn = engine.connect()  

 class User(object):
     def __init__(self, name, fullname, password):
         self.name = name
         self.fullname = fullname
         self.password = password 

 mapper(User, user) 

 user_name = raw_input('name >')
 user_fullname = raw_input('fullname >')
 user_password = raw_input('password >')

 ed_user = user.insert(values=dict(name=user_name,fullname=user_fullname,password=user_password))
 conn.execute(ed_user)
 conn.close()

在django admin显示：

先创建一个app，然后按照django的教程弄出django管理（表名不是这个例子的）

只要SQLAlchemy创建的表和model.py的表名一样，就可以显示出来了。

model.py

 from django.db import models

 class User(models.Model):
     id = models.AutoField(primary_key=True)
     name = models.CharField(max_length=20)
     fullname = models.CharField(max_length=20)
     password = models.CharField(max_length=20)

     def __unicode__(self):
         return self.name    

参考资料：

http://wangye.org/blog/archives/date/2012/10

http://www.cnblogs.com/fangyu19900812/admin/EditPosts.aspx?opt=1    （这个要慢慢找）

http://docs.sqlalchemy.org/en/rel_0_7/     官方文档

http://www.blogjava.net/sean/archive/2009/01/26/252597.html