Hi,
I'm using the following table (shortened, removed unnecessary columns)
to store a menu tree.
class MenuNode(Base):
__tablename__ = 'menu'
id = Column(Integer, primary_key=True, nullable=False,
unique=True)
parent_id = Column(Integer, ForeignKey('menu.id',
onupdate='CASCADE', ondelete='CASCADE'), nullable=True, index=True)
name = Column(String(64), nullable=False)
parent = relationship('MenuNode', remote_side='MenuNode.id',
cascade='all, delete', passive_deletes=True,
backref=backref('children', order_by=position))
Top-level menu nodes have parent_id=NULL.
When deleting a node via session.delete(node) sqlalchemy issues UPDATE
statements to set all children's parent_id fields to NULL instead of
deleting the children.
How can i tell SA that I want to delete any children?
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