On Jul 16, 2014, at 1:29 AM, Pavel Aborilov <[email protected]> wrote:
> Hi!
> I have two models
>
> class DB_Object(Base):
> __tablename__ = 'objects'
> id = Column(Integer, primary_key=True)
> name = Column(String(50), unique=True, nullable=False)
> type = Column(String(50), default="object")
> __mapper_args__ = { 'polymorphic_identity': 'object', 'polymorphic_on':
> type }
>
> class Contact(DB_Object):
> __tablename__ = 'contacts'
> id = Column(Integer, ForeignKey('objects.id'), primary_key=True)
> enable = Column(Boolean, default=False)
> normal_open = Column(Boolean, default=True)
> cr_enabled = Column(Boolean, default=False)
> __mapper_args__ = {'polymorphic_identity': 'contact'}
>
> I need to delete group of contacts by id, but
> if I do
>
> ids = (1,2,3)
> session.query(Contact).filter(Contact.id.in_(ids)).delete(synchronize_session="fetch")
>
> it's remove only contacts and leave object in "objects" table.
>
> If i remove like this:
> o = session.query(Contact).get(id)
> session.delete(o)
>
> it remove objects from both tables.
>
> How can I do this for group of id?
sorry, I read that completely wrong. Inheritance. Yeah, again query.delete()
can't work for an inherited subclass like that. You'd need to DELETE on the
base table and again ON DELETE CASCADE would need to accommodate the child
table.
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