orgexample.py

from sqlalchemy import Column, Integer, String, ForeignKey
from sqlalchemy import create_engine
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import backref, mapper, relation, sessionmaker

Base = declarative_base()

########################################################################
class User(Base):
    """"""
    __tablename__ = "users"
    
    id = Column(Integer, primary_key=True)
    name = Column(String)
    fullname = Column(String)
    password = Column(String)
    
    #----------------------------------------------------------------------
    def __init__(self, name, fullname, password):
        """Constructor"""
        self.name = name
        self.fullname = fullname
        self.password = password
        
    def __repr__(self):
        return "<User('%s','%s', '%s')>" % (self.name, self.fullname, self.password)
    
########################################################################
class Address(Base):
    """
    Address Class
    
    Create some class properties before initilization
    """
    __tablename__ = "addresses"
    id = Column(Integer, primary_key=True)
    email_address = Column(String, nullable=False)
    user_id = Column(Integer, ForeignKey('users.id'))
    
    # creates a bidirectional relationship
    # from Address to User it's Many-to-One
    # from User to Address it's One-to-Many
    user = relation(User, backref=backref('addresses', order_by=id))
    
    #----------------------------------------------------------------------
    def __init__(self, email_address):
        """Constructor"""
        self.email_address = email_address
        
    def __repr__(self):
        return "<Address('%s')>" % self.email_address
    
    
# create a connection to a sqlite database
# turn echo on to see the auto-generated SQL
engine = create_engine("sqlite:///tutorial.db", echo=True)

# get a handle on the table object
users_table = User.__table__
# get a handle on the metadata
metadata = Base.metadata
metadata.create_all(engine)

mike_user = User("mike", "Mike Driscoll", "password")
print "User name: %s, fullname: %s, password: %s" % (mike_user.name,
                                                     mike_user.fullname,
                                                     mike_user.password)
Session = sessionmaker(bind=engine)
session = Session()
# session.add(a)
# a.addresses = ["andrea.crotti.0@gmail.com", "kerny404@gmail.com"]
# session.commit()