[Sqlalchemy-tickets] [sqlalchemy] #2900: relationship aliased on subclass causes infinite recursion

[sqlalchemy <mi...@zz...>]

#2900: relationship aliased on subclass causes infinite recursion
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 Reporter:  scraper  |           Owner:  zzzeek
     Type:  defect   |          Status:  new
 Priority:  medium   |       Milestone:
Component:  orm      |        Severity:  no triage selected yet
 Keywords:           |  Progress State:  awaiting triage
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 Having additional names for a relationship in a subclass works with
 sqlalchemy <= 0.8.4
 With 0.9.0 setting the attribute as seen below gives '''RuntimeError:
 maximum recursion depth exceeded'''

 {{{
 from sqlalchemy.ext.declarative import declarative_base
 from sqlalchemy import Column, Integer, ForeignKey
 from sqlalchemy.orm import relationship, backref

 Base = declarative_base()

 class Child(Base):
     __tablename__ = 'child'
     id = Column(Integer, primary_key=True)
     foo_id = Column(Integer, ForeignKey('foo.id'))
     foo = relationship('Foo', backref=backref('children'))

 class FooChild(Child):
     parent = Child.foo

 class Foo(Base):
     __tablename__ = 'foo'
     id = Column(Integer, primary_key=True)

 FooChild(parent=Foo())
 }}}

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Ticket URL: <http://www.sqlalchemy.org/trac/ticket/2900>
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