As simple as that... thanks!
On 31 oct, 01:32, Michael Bayer <[EMAIL PROTECTED]> wrote:
> oh sorry, I was on autopilot. Two different classes indeed.
>
> If you aren't using ForeignKey, the foreign_keys argument points to
> the column or columns that would have ForeignKey on them, so the
> argument should be the same in both directions on the relation:
>
> parent = relation(Parent,
> primaryjoin=id_parent==Parent.id,
> foreign_keys=[id_parent],
> backref=backref('children',
> foreign_keys=[id_parent],
> cascade='all, delete-orphan',
> passive_deletes=False))
>
> On Oct 30, 2008, at 6:58 PM, GustaV wrote:
>
> > rom zope.sqlalchemy import ZopeTransactionExtension
> > from sqlalchemy.orm import scoped_session, sessionmaker, eagerload
> > from sqlalchemy import MetaData
> > from sqlalchemy.orm.interfaces import SessionExtension
> > from sqlalchemy.ext.declarative import declarative_base
> > from sqlalchemy import Table, Column, types
> > from sqlalchemy import ForeignKey, UniqueConstraint
> > from sqlalchemy.orm import relation, backref, synonym
> > from sqlalchemy import select, func
>
> > maker = sessionmaker(autoflush=True, autocommit=False,
> > extension=[ZopeTransactionExtension()])
> > DBSession = scoped_session(maker)
> > DeclarativeBase = declarative_base()
>
> > class Parent(DeclarativeBase):
> > __tablename__ = 'parent'
> > id = Column('id', types.Integer, primary_key=True,
> > nullable=False)
>
> > class Child(DeclarativeBase):
> > __tablename__ = 'child'
> > id = Column('id', types.Integer, primary_key=True,
> > nullable=False)
> > id_parent = Column('id_parent', types.Integer,
> > nullable=True)
> > parent = relation(Parent,
> > primaryjoin=id_parent==Parent.id,
> > foreign_keys=[Parent.id],
> > backref=backref('children',
> > foreign_keys=[id_parent],
> > cascade='all, delete-orphan',
> > passive_deletes=False))
>
> > p = Parent()
> > c = Child()
> > p.children.append(c)
> > DBSession.add(p)
> > DBSession.flush()
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