>From your code it's not clear how you're going to differentiate between "matches" and "merges" - basically, you need something in your database which makes "matches" different from "merges" and then configure the retationships to use those fields.
See the "Boston addresses" example in the documentation: http://docs.sqlalchemy.org/en/latest/orm/relationships.html#specifying-alternate-join-conditions Or maybe you even need two FKs - source_id and another one, and, again, configure the relationships to use those FKs. http://docs.sqlalchemy.org/en/latest/orm/relationships.html#specifying-foreign-keys On Mar 18, 7:18 pm, Devraj Mukherjee <dev...@gmail.com> wrote: > Hi all, > > I am trying to created self references to a Table, I actually need two > self references back to the same Table. > > matches = relationship("Criterion") > merges = relationship("Criterion") > > What I notice happens is the references are getting mixed up. Hence > when I add to matches it adds to the merges property. > > Is there a better / cleaner way of doing this? > > Here's what I have for now: > > class Criterion(Base): > > __tablename__ = 'criterion' > criterion_id = Column(Integer, Sequence('criterion_sequence'), > primary_key=True) > standard_id = Column(Integer, ForeignKey('standard.standard_id', > ondelete="CASCADE"), nullable=False) > source_id = Column(Integer, ForeignKey('criterion.criterion_id'), > nullable=True) > > number = Column(Integer()) > title = Column(Text()) > statement = Column(Text()) > created = Column(DateTime, default=func.current_timestamp()) > last_updated = Column(DateTime, default=func.current_timestamp(), > onupdate=func.current_timestamp()) > > matches = relationship("Criterion") > merges = relationship("Criterion") -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalchemy@googlegroups.com. To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en.
