Module « sqlalchemy »

Classe « Boolean »

Informations générales

Héritage

builtins.object
    SchemaEventTarget
        SchemaType
builtins.object
    Traversible
        TypeEngine
    builtins.object
        Emulated
            Boolean

Définition

class Boolean(Emulated, TypeEngine, SchemaType):

Description _{[extrait de Boolean.__doc__]}

A bool datatype.

    :class:`.Boolean` typically uses BOOLEAN or SMALLINT on the DDL side,
    and on the Python side deals in ``True`` or ``False``.

    The :class:`.Boolean` datatype currently has two levels of assertion
    that the values persisted are simple true/false values.  For all
    backends, only the Python values ``None``, ``True``, ``False``, ``1``
    or ``0`` are accepted as parameter values.   For those backends that
    don't support a "native boolean" datatype, an option exists to
    also create a CHECK constraint on the target column

    .. versionchanged:: 1.2 the :class:`.Boolean` datatype now asserts that
       incoming Python values are already in pure boolean form.


    

Constructeur(s)

Signature du constructeur	Description
__init__(self, create_constraint=False, name=None, _create_events=True)	Construct a Boolean. [extrait de __init__.__doc__]

Liste des opérateurs

Opérateurs hérités de la classe object

__eq__, __ge__, __gt__, __le__, __lt__, __ne__

Méthodes héritées de la classe SchemaType

__init_subclass__, __subclasshook__, adapt, copy, create, drop

Méthodes héritées de la classe TypeEngine

__repr__, __str__, as_generic, bind_expression, coerce_compared_value, column_expression, Comparator, comparator_factory, compare_against_backend, compare_values, compile, copy_value, dialect_impl, evaluates_none, get_dbapi_type, with_variant

Méthodes héritées de la classe Traversible

__class_getitem__, get_children

Méthodes héritées de la classe Emulated

adapt_to_emulated

Méthodes héritées de la classe object

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