sure its along these lines
class Content(my_declarative_base):
__tablename__ = 'content'
id = Column(Integer, primary_key=True)
title = Column(String(80))
parent_id = Column(Integer, ForeignKey('content.id'))
type = Column(String(32))
children = relation("Content", backref=backref('parent',
remote_side=id))
__mapper_args__ = {'polymorphic_on':type,
'polymorphic_identity':'content'}
On Nov 11, 2008, at 10:13 AM, cropr wrote:
>
> Does somebody know if is possible to use a declarative class
> definition for the schema below
>
> ####
> content = Table('content', meta.metadata,
> Column('id', types.Integer, primary_key=True, autoincrement=True),
> Column('title', types.String(80)),
> Column('parent_id', types.Integer, ForeignKey('content.id')),
> Column('type',types.String(32)),
> )
>
> class Content(object):
>
> mapper(Content, content, polymorphic_on=content.c.type,
> polymorphic_identity='content', properties={
> 'children': relation(Content, backref=backref('parent',
> remote_side=[content.c.id]))
> })
> ####
>
>
> >
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