Execute after an instance is attached to a session. This is called after an add, delete or merge. .. note:: As of 0.8, this event fires off *after* the item has been fully associated with the session, which is different than previous releases. For
(self, session: Session, instance: _O)
| 2069 | |
| 2070 | @_lifecycle_event |
| 2071 | def after_attach(self, session: Session, instance: _O) -> None: |
| 2072 | """Execute after an instance is attached to a session. |
| 2073 | |
| 2074 | This is called after an add, delete or merge. |
| 2075 | |
| 2076 | .. note:: |
| 2077 | |
| 2078 | As of 0.8, this event fires off *after* the item |
| 2079 | has been fully associated with the session, which is |
| 2080 | different than previous releases. For event |
| 2081 | handlers that require the object not yet |
| 2082 | be part of session state (such as handlers which |
| 2083 | may autoflush while the target object is not |
| 2084 | yet complete) consider the |
| 2085 | new :meth:`.before_attach` event. |
| 2086 | |
| 2087 | .. seealso:: |
| 2088 | |
| 2089 | :meth:`~.SessionEvents.before_attach` |
| 2090 | |
| 2091 | :ref:`session_lifecycle_events` |
| 2092 | |
| 2093 | """ |
| 2094 | |
| 2095 | @event._legacy_signature( |
| 2096 | "0.9", |