We've never supported "del obj.attrname" as a means of setting an attribute to None (which translates to NULL in SQL). Setting the value to None explicitly is preferred.
On Jul 12, 2013, at 12:16 PM, lars van gemerden <[email protected]> wrote: > Hi all, > > I had an arror in my code and i think i have reconstructed it as follows: > > ----------------------------------------------------------------------------------------------- > > from sqlalchemy import Column, Integer, String > from sqlalchemy import create_engine > from sqlalchemy.orm import sessionmaker > from sqlalchemy.ext.declarative import declarative_base > > Base = declarative_base() > engine = create_engine('sqlite:///:memory:', echo=True) > Session = sessionmaker(bind=engine) > > class User(Base): > __tablename__ = 'users' > id = Column(Integer, primary_key=True) > name = Column(String) > > Base.metadata.create_all(engine) > > session = Session() > user = User(name = 'bob') > session.add(user) > session.commit() > #user.name > del user.name #error in sqlalchemy file attributes.py line 529 > #user.name > session.commit() > assert user.name == None #error: user.name is still 'bob' > > ------------------------------------------------------------------------------------------------------------ > > These two errors do not occur if i access the attributes before the delete or > the commit (i.e. uncomment the #user.name lines). > > I am using version 7.5; are these errors solved by the latest version? > > I would like to avoid upgrading at this point, but if i could be reasonably > sure that upgrading solves the problem, then no problem .. > > Cheers, Lars > > > > -- > You received this message because you are subscribed to the Google Groups > "sqlalchemy" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/sqlalchemy. > For more options, visit https://groups.google.com/groups/opt_out. > > -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/groups/opt_out.
