t; attributes.set_committed_value(oldvalue, "address", None)
>
>
> the "set_committed_value" is to avoid triggering any new events which
> will cause a recursion overflow.
>
>
>
> On Wed, Mar 28, 2018 at 10:49 AM, Serhii Mozghovyi > wrote:
> >
Is it possible to make child objects (many-to-one side) delete itself from
the old parent's collection when it is added to a different parent?
See the file attached. The old parent remains unaware that he doesn't have
this child anymore.
P.S. session.expire() is an obvious solution but too heav
