Module « sqlalchemy »

Classe « Computed »

Informations générales

Héritage

builtins.object
    Traversible
builtins.object
    SchemaEventTarget
        SchemaItem
builtins.object
    SchemaEventTarget
        FetchedValue
            Computed

Définition

class Computed(FetchedValue, SchemaItem):

Description _{[extrait de Computed.__doc__]}

Defines a generated column, i.e. "GENERATED ALWAYS AS" syntax.

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

        from sqlalchemy import Computed

        Table('square', meta,
            Column('side', Float, nullable=False),
            Column('area', Float, Computed('side * side'))
        )

    See the linked documentation below for complete details.

    .. versionadded:: 1.3.11

    .. seealso::

        :ref:`computed_ddl`

    

Constructeur(s)

Signature du constructeur	Description
__init__(self, sqltext, persisted=None)	Construct a GENERATED ALWAYS AS DDL construct to accompany a [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__