I tried the tutorial for version 0.4.8 but the example doesnt work
for me. So I simplified the code the code a little bit but with
session.commit I get always an exception, because sqlalchemy tries to
insert a none into user_name and nothing into the primary key. Could
someone help me?
#==========
lfrom sqlalchemy import *
from sqlalchemy.orm import *
engine = create_engine('sqlite:///:memory:', echo=True)
metadata = MetaData()
users_table = Table('users', metadata,
Column('user_id', String(4), primary_key = True),
Column('user_name', String(16), nullable = False),
)
metadata.create_all(engine)
class User(object):
def __init__(self, id, name):
self.id = id
self.name = name
def __repr__(self):
return "<User('%4s','%16s')>" % (self.id, self.name)
m= mapper(User, users_table)
Session = sessionmaker(bind=engine, autoflush=True,
transactional=True)
session= Session()
print User(id='ed',name='Ede Myers')
session.save(User(id='ed', name='Ede Myers'))
session.commit()
session.close()
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