Posted on 2009-02-26 11:46
oxl 阅读(136)
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import sqlalchemy
from sqlalchemy.orm import relation, backref, sessionmaker
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy import Column, Integer, String, ForeignKey
engine = sqlalchemy.create_engine('sqlite:///:memory:', echo=True)
Base = declarative_base()
session = sessionmaker(bind=engine)()
class Address(Base):
__tablename__ = 'addresses'
id = Column(Integer, primary_key=True)
content = Column(String)
user_id = Column(Integer, sqlalchemy.ForeignKey('users.id'))
def __init__(self, user, content):
self.user = user
self.content = content
def __repr__(self):
return "<Address('%s')>" % self.content
class User(Base):
__tablename__ = 'users'
id = Column(Integer, primary_key=True)
name = Column(String)
comment = Column(String)
addresses = relation('Address', order_by='Address.id', backref='user')
def __init__(self, name, comment):
self.name = name
self.comment = comment
def __repr__(self):
return "<User('%s', '%s')>" % (self.name, self.comment)
class Photo(Base):
__tablename__ = 'photos'
id = Column(Integer, primary_key=True)
name = Column(String)
user_id = Column(Integer, ForeignKey('users.id'))
user = relation('User', backref=backref('photos'))
def __init__(self, user, name):
self.user = user
self.name = name
def __repr__(self):
return "<Photo('%s')>" % self.name
Base.metadata.create_all(bind=engine)