thats diff. thing, see self-ref. relations
http://www.sqlalchemy.org/docs/05/mappers.html#adjacency-list-relationships
On Monday 16 February 2009 11:18:59 一首诗 wrote:
> Like this ?
> -------------------------------------------------------------------
>----------------------------- class User(Base):
> __tablename__ = 'users'
>
> id = Column(Integer, primary_key=True)
> name = Column(String)
> fullname = Column(String)
> password = Column(String)
> sons = relation('User', order_by='User.id', backref="parent")
>
> -------------------------------------------------------------------
>-----------------------------
>
> I got an Exception:
>
> sqlalchemy.exc.ArgumentError: Could not determine join condition
> between parent/child tables on relation User.sons. Specify a
> 'primaryjoin' expression. If this is a many-to-many relation,
> 'secondaryjoin' is needed as well.
>
> On Feb 16, 5:08 pm, [email protected] wrote:
> > put it as text, it will be eval()'uated later
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