Method refresh_flush

lib/sqlalchemy/orm/events.py:523–568

Receive an object instance after one or more attributes that contain a column-level default or onupdate handler have been refreshed during persistence of the object's state. This event is the same as :meth:`.InstanceEvents.refresh` except it is invoked within the uni

(
        self,
        target: _O,
        flush_context: UOWTransaction,
        attrs: Optional[Iterable[str]],
    )

        """

    def refresh_flush(
        self,
        target: _O,
        flush_context: UOWTransaction,
        attrs: Optional[Iterable[str]],
    ) -> None:
        """Receive an object instance after one or more attributes that
        contain a column-level default or onupdate handler have been refreshed
        during persistence of the object's state.

        This event is the same as :meth:`.InstanceEvents.refresh` except
        it is invoked within the unit of work flush process, and includes
        only non-primary-key columns that have column level default or
        onupdate handlers, including Python callables as well as server side
        defaults and triggers which may be fetched via the RETURNING clause.

        .. note::

            While the :meth:`.InstanceEvents.refresh_flush` event is triggered
            for an object that was INSERTed as well as for an object that was
            UPDATEd, the event is geared primarily  towards the UPDATE process;
            it is mostly an internal artifact that INSERT actions can also
            trigger this event, and note that **primary key columns for an
            INSERTed row are explicitly omitted** from this event.  In order to
            intercept the newly INSERTed state of an object, the
            :meth:`.SessionEvents.pending_to_persistent` and
            :meth:`.MapperEvents.after_insert` are better choices.

        :param target: the mapped instance.  If
         the event is configured with ``raw=True``, this will
         instead be the :class:`.InstanceState` state-management
         object associated with the instance.
        :param flush_context: Internal :class:`.UOWTransaction` object
         which handles the details of the flush.
        :param attrs: sequence of attribute names which
         were populated.

        .. seealso::

            :ref:`mapped_class_load_events`

            :ref:`orm_server_defaults`

            :ref:`metadata_defaults_toplevel`

        """

    def expire(self, target: _O, attrs: Optional[Iterable[str]]) -> None:
        """Receive an object instance after its attributes or some subset