sqlalchemy.event.attr._ListenerCollection

class documentation

class _ListenerCollection(_CompoundListener):

Instance-level attributes on instances of ._Dispatch.

Represents a collection of listeners.

As of 0.7.9, _ListenerCollection is only first created via the _EmptyListener.for_modify() method.

Method	`__init__`	Undocumented
Method	`_update`	Populate from the listeners in another `_Dispatch` object.
Method	`append`	Undocumented
Method	`clear`	Undocumented
Method	`for_modify`	Return an event collection which can be modified.
Method	`insert`	Undocumented
Method	`remove`	Undocumented
Class Variable	`__slots__`	Undocumented
Instance Variable	`_exec_once`	Undocumented
Instance Variable	`_exec_w_sync_once`	Undocumented
Instance Variable	`listeners`	Undocumented
Instance Variable	`name`	Undocumented
Instance Variable	`parent`	Undocumented
Instance Variable	`parent_listeners`	Undocumented
Instance Variable	`propagate`	Undocumented

Inherited from _CompoundListener:

Method	`__bool__`	Undocumented
Method	`__call__`	Execute this event.
Method	`__iter__`	Undocumented
Method	`__len__`	Undocumented
Method	`_exec_once_impl`	Undocumented
Method	`_exec_w_sync_on_first_run`	No summary
Method	`_memoized_attr__exec_once_mutex`	Undocumented
Method	`_set_asyncio`	Undocumented
Method	`exec_once`	Execute this event, but only if it has not been executed already for this collection.
Method	`exec_once_unless_exception`	No summary
Instance Variable	`_exec_once_mutex`	Undocumented

Method _adjust_fn_spec Undocumented

Method _memoized_attr_ref Undocumented

Method	`__getattr__`	Undocumented
Method	`_fallback_getattr`	Undocumented

def __init__(self, parent, target_cls):

Undocumented

def _update(self, other, only_propagate=True):

Populate from the listeners in another _Dispatch object.

def append(self, event_key, propagate):

Undocumented

def clear(self):

Undocumented

def for_modify(self, obj):

Return an event collection which can be modified.

For _ListenerCollection at the instance level of a dispatcher, this returns self.

def insert(self, event_key, propagate):

Undocumented

def remove(self, event_key):

Undocumented

__slots__: tuple[str, ...] =

overrides sqlalchemy.event.attr._CompoundListener.__slots__

Undocumented

_exec_once: bool =

overrides sqlalchemy.event.attr._CompoundListener._exec_once

Undocumented

_exec_w_sync_once: bool =

overrides sqlalchemy.event.attr._CompoundListener._exec_w_sync_once

Undocumented

listeners =

Undocumented

name =

Undocumented

parent =

Undocumented

parent_listeners =

Undocumented

propagate: set =

Undocumented