Module « sqlalchemy »

Classe « Identity »

Informations générales

Héritage

builtins.object
    Traversible
builtins.object
    SchemaEventTarget
        SchemaItem
builtins.object
    SchemaEventTarget
        FetchedValue
    builtins.object
        IdentityOptions
            Identity

Définition

class Identity(IdentityOptions, FetchedValue, SchemaItem):

Description _{[extrait de Identity.__doc__]}

Defines an identity column, i.e. "GENERATED { ALWAYS | BY DEFAULT }
    AS IDENTITY" syntax.

    The :class:`.Identity` construct is an inline construct added to the
    argument list of a :class:`_schema.Column` object::

        from sqlalchemy import Identity

        Table('foo', meta,
            Column('id', Integer, Identity())
            Column('description', Text),
        )

    See the linked documentation below for complete details.

    .. versionadded:: 1.4

    .. seealso::

        :ref:`identity_ddl`

    

Constructeur(s)

Signature du constructeur	Description
__init__(self, always=False, on_null=None, start=None, increment=None, minvalue=None, maxvalue=None, nominvalue=None, nomaxvalue=None, cycle=None, cache=None, order=None)	Construct a GENERATED { ALWAYS | BY DEFAULT } AS IDENTITY DDL [extrait de __init__.__doc__]

Liste des opérateurs

Opérateurs hérités de la classe object

__eq__, __ge__, __gt__, __le__, __lt__, __ne__

Méthodes héritées de la classe SchemaItem

__init_subclass__, __repr__, __subclasshook__

Méthodes héritées de la classe Traversible

__class_getitem__, get_children

Méthodes héritées de la classe object

__delattr__, __dir__, __format__, __getattribute__, __hash__, __reduce__, __reduce_ex__, __setattr__, __sizeof__, __str__