Module « sqlalchemy »

Classe « ForeignKeyConstraint »

Informations générales

Héritage

builtins.object
    Traversible
builtins.object
    SchemaEventTarget
        SchemaItem
    builtins.object
        DialectKWArgs
            Constraint
        builtins.object
            ColumnCollectionMixin
                ColumnCollectionConstraint
                    ForeignKeyConstraint

Définition

class ForeignKeyConstraint(ColumnCollectionConstraint):

Description _{[extrait de ForeignKeyConstraint.doc]}

A table-level FOREIGN KEY constraint.

    Defines a single column or composite FOREIGN KEY ... REFERENCES
    constraint. For a no-frills, single column foreign key, adding a
    :class:`_schema.ForeignKey` to the definition of a :class:`_schema.Column`
    is a
    shorthand equivalent for an unnamed, single column
    :class:`_schema.ForeignKeyConstraint`.

    Examples of foreign key configuration are in :ref:`metadata_foreignkeys`.

Constructeur(s)

Signature du constructeur	Description
__init__(self, columns, refcolumns, name=None, onupdate=None, ondelete=None, deferrable=None, initially=None, use_alter=False, link_to_name=False, match=None, table=None, info=None, **dialect_kw)	Construct a composite-capable FOREIGN KEY. _{[extrait de __init__.__doc__]}

Liste des attributs statiques

Nom de l'attribut	Valeur
columns	None
create_drop_stringify_dialect	default
dialect_kwargs	<sqlalchemy.util.langhelpers.memoized_property object at 0x7f40cbecc6d0>
dialect_options	<sqlalchemy.util.langhelpers.memoized_property object at 0x7f40cbece8c0>
dispatch	<sqlalchemy.event.base.DDLEventsDispatch object at 0x7f40cbc2af40>
elements	None
info	<sqlalchemy.util.langhelpers.memoized_property object at 0x7f40cbc85d20>

Liste des propriétés

Nom de la propriété	Description
column_keys	Return a list of string keys representing the local _{[extrait de __doc__]}
kwargs	A synonym for :attr:`.DialectKWArgs.dialect_kwargs`. _{[extrait de __doc__]}
referred_table	The :class:`_schema.Table` object to which this _{[extrait de __doc__]}
table