Module « sqlalchemy.orm »

Classe « AttributeEvent »

Informations générales

Héritage

builtins.object
    AttributeEvent

Définition

class AttributeEvent(builtins.object):

Description _{[extrait de AttributeEvent.__doc__]}

A token propagated throughout the course of a chain of attribute
    events.

    Serves as an indicator of the source of the event and also provides
    a means of controlling propagation across a chain of attribute
    operations.

    The :class:`.Event` object is sent as the ``initiator`` argument
    when dealing with events such as :meth:`.AttributeEvents.append`,
    :meth:`.AttributeEvents.set`,
    and :meth:`.AttributeEvents.remove`.

    The :class:`.Event` object is currently interpreted by the backref
    event handlers, and is used to control the propagation of operations
    across two mutually-dependent attributes.

    .. versionadded:: 0.9.0

    :attribute impl: The :class:`.AttributeImpl` which is the current event
     initiator.

    :attribute op: The symbol :attr:`.OP_APPEND`, :attr:`.OP_REMOVE`,
     :attr:`.OP_REPLACE`, or :attr:`.OP_BULK_REPLACE`, indicating the
     source operation.

    

Constructeur(s)

Signature du constructeur	Description
__init__(self, attribute_impl, op)

Opérateurs hérités de la classe object

__ge__, __gt__, __le__, __lt__, __ne__

Méthodes héritées de la classe object

__delattr__, __dir__, __format__, __getattribute__, __hash__, __init_subclass__, __reduce__, __reduce_ex__, __repr__, __setattr__, __sizeof__, __str__, __subclasshook__