Michael,
Thanks for getting back to me so quickly. I've figured out how to get a
one-to-many, single table relationship working with one way relations,
here is that configuration:
class JobData(Base):
__tablename__ = "jobs"
id = Column(Integer, primary_key=True, autoincrement=True)
pid = Column('pid', Integer, ForeignKey('jobs.id'))
srcpath = Column(String(128), default=None)
press = Column(Integer, default=None)
priority = Column(Integer, default=None)
created = Column(DateTime, default=datetime.datetime.now)
def __init__(self, srcpath=None):
session = Session()
self.srcpath = srcpath
session.add(self)
session.commit()
Jobs that are children of other jobs get their pid field initialized,
and this seems to work well.
I wasn't sure if the link you sent was what you intended as that brought
up a page about eager loading. However, it was interesting reading all
the same!
Thanks again,
Doug
> -----Original Message-----
> From: [email protected] [mailto:[EMAIL PROTECTED]
> On Behalf Of Empty
> Sent: Wednesday, September 17, 2008 9:02 AM
> To: [email protected]
> Subject: [sqlalchemy] Re: Declarative documentation
>
>
> Hi Doug,
>
> > I'm a new user (like this week) of SqlAlchemy and I'm trying to find
> > more information about using the Declarative system. In particular
> I'm
> > trying to build a hierarchical table with one-to-many relationships
> > within the table. So if anyone knows where there might be some
> > additional documentation about this, examples or just some guidance,
> > I'd very much appreciate it!!
>
> There's extensive documentation online and in the ext/declarative.py
> module itself. Beyond that it's basically just straight SQLAlchemy.
> So you would be handling a self referential hierarchy as demonstrated
> here:
>
>
http://www.sqlalchemy.org/docs/05/mappers.html#advdatamapping_relation_
> selfreferential
>
> I hope that helps.
>
> Michael
> http://blog.michaeltrier.com/
>
>
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