Hi Guys,
Im using sqlachemy SQLAlchemy==1.0.14 on PostgresDB.
Im trying to understand if it is possible to delete all childs in a one to
many relation but with the distinction that there would be orphans in the
table, that is childs with the foreign key in NULL.
This is what I have....
Class Parent(Base):
__tablename__ = 'parent_table'
id = Column(Integer, primary_key=True)
Class Child(Base):
__tablename__ = 'parent_table'
id = Column(Integer, primary_key=True)
parent_id = Column(Integer, ForeignKey('parent_table.id',
ondelete='CASCADE'), index=True, *nulleable=True*)
parent = relationship("Parent", backref=backref("childs",
passive_deletes=True,
cascade="all, delete"))
With the above definition when I do:
parent = s.query(Parent).first()
s.delete(parent)
The parent row is deleted, but the related childs are not, the cascade
relation does not work.
If I remove the *nulleable=True *from the foreingkey definition then the
cascade works as expected.... Is any configuration that I may be missing to
make it work with the nulleable=True...
Thanks a lot.
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