Module « sqlalchemy.orm »

Fonction selectin_polymorphic - module sqlalchemy.orm

Signature de la fonction selectin_polymorphic

def selectin_polymorphic(base_cls, classes) 

Description

selectin_polymorphic.__doc__

Indicate an eager load should take place for all attributes
    specific to a subclass.

    This uses an additional SELECT with IN against all matched primary
    key values, and is the per-query analogue to the ``"selectin"``
    setting on the :paramref:`.mapper.polymorphic_load` parameter.

    .. versionadded:: 1.2

    .. seealso::

        :ref:`polymorphic_selectin`