sqlalchemy.event.base.

class documentation

class _Dispatch(_DispatchCommon[_ET]): (source)

Mirror the event listening definitions of an Events class with listener collections. Classes which define a "dispatch" member will return a non-instantiated :class:`._Dispatch` subclass when the member is accessed at the class level. When the "dispatch" member is accessed at the instance level of its owner, an instance of the :class:`._Dispatch` class is returned. A :class:`._Dispatch` class is generated for each :class:`.Events` class defined, by the :meth:`._HasEventsDispatch._create_dispatcher_class` method. The original :class:`.Events` classes remain untouched. This decouples the construction of :class:`.Events` subclasses from the implementation used by the event internals, and allows inspecting tools like Sphinx to work in an unsurprising way against the public API.

Method	`__getattr__`	Undocumented
Method	`__init__`	Undocumented
Method	`__reduce__`	Undocumented
Class Variable	`__slots__`	Undocumented
Method	`_clear`	Undocumented
Method	`_for_class`	Undocumented
Method	`_for_instance`	Undocumented
Method	`_join`	Create a 'join' of this :class:`._Dispatch` and another.
Method	`_listen`	Undocumented
Method	`_update`	Populate from the listeners in another :class:`_Dispatch` object.
Class Variable	`_active_history`	Undocumented
Class Variable	`_empty_listener_reg`	Undocumented
Class Variable	`_event_names`	Undocumented
Class Variable	`_events`	reference back to the Events class.
Class Variable	`_joined_dispatch_cls`	Undocumented
Instance Variable	`_empty_listeners`	Undocumented
Instance Variable	`_instance_cls`	Undocumented
Instance Variable	`_parent`	Undocumented
Property	`_event_descriptors`	Undocumented