Classe « BOOLEAN »

Constructeur sqlalchemy.BOOLEAN.__init__

Signature de la constructeur __init__

def __init__(self, create_constraint=False, name=None, _create_events=True) 

Description

__init__.__doc__

Construct a Boolean.

        :param create_constraint: defaults to False.  If the boolean
          is generated as an int/smallint, also create a CHECK constraint
          on the table that ensures 1 or 0 as a value.

          .. note:: it is strongly recommended that the CHECK constraint
             have an explicit name in order to support schema-management
             concerns.  This can be established either by setting the
             :paramref:`.Boolean.name` parameter or by setting up an
             appropriate naming convention; see
             :ref:`constraint_naming_conventions` for background.

          .. versionchanged:: 1.4 - this flag now defaults to False, meaning
             no CHECK constraint is generated for a non-native enumerated
             type.

        :param name: if a CHECK constraint is generated, specify
          the name of the constraint.