gistfile1.txt

#Map vip's to issues
parent_child_table = Table('parent_child', Base.metadata,
                                    Column('parent_id', Integer, ForeignKey('parent.id')),
                                    Column('child_id', Integer, ForeignKey('child.id')))

class Parent(Base):
    __tablename__ = 'parent'
    id = Column(Integer, primary_key=True)
    children = relationship("Child", secondary = parent_child_table)


class Child(Base):
    __tablename__ = 'child'
    id = Column(Integer, primary_key=True)
    parents = relationship("Parent", secondary=parent_child_table)