class Parent(Base):<br /> __tablename__ = ‘parent’<br /> id = Column(Integer, primary_key=True)<br /> children = relationship(“Child”, back_populates=”parent”)</p> <p>class Child(Base):<br /> __tablename__ = ‘child’<br /> id = Column(Integer, primary_key=True)<br /> parent_id = Column(Integer, ForeignKey(‘parent.id’))<br /> parent = relationship(“Parent”, back_populates=”children”)

association_table = Table(‘association’, Base.metadata,<br /> Column(‘left_id’, Integer, ForeignKey(‘left.id’)),<br /> Column(‘right_id’, Integer, ForeignKey(‘right.id’))<br /> )</p> <p>class Parent(Base):<br /> __tablename__ = ‘left’<br /> id = Column(Integer, primary_key=True)<br /> children = relationship(<br /> “Child”,<br /> secondary=association_table,<br /> back_populates=”parents”)</p> <p>class Child(Base):<br /> __tablename__ = ‘right’<br /> id = Column(Integer, primary_key=True)<br /> parents = relationship(<br /> “Parent”,<br /> secondary=association_table,<br /> back_populates=”children”)