On Tuesday, April 7, 2015 at 4:00:28 PM UTC-7, Michael Bayer wrote:
One event approach would be the before_flush() event, you search through
session.deleted for all Container objects; within Container, locate all Tag
entries with that Container as the ultimate parent and mark them all as
How can I cascade delete from a many to one only when deleting the many
means this one has no other children?
Imagine the following mapping:
class Container(Base):
__tablename__ = 'container'
pk = sa.Column(sa.Integer, primary_key=True)
entries = relationship('Entry',
On 4/7/15 4:43 PM, Jonathan Gordon wrote:
How can I cascade delete from a many to one only when deleting the
many means this one has no other children?
Imagine the following mapping:
class Container(Base):
__tablename__ = 'container'
pk = sa.Column(sa.Integer, primary_key=True)
