Module « sqlalchemy.orm »

Fonction deferred - module sqlalchemy.orm

Signature de la fonction deferred

def deferred(*columns, **kw) 

Description

deferred.__doc__

Indicate a column-based mapped attribute that by default will
    not load unless accessed.

    :param \*columns: columns to be mapped.  This is typically a single
     :class:`_schema.Column` object,
     however a collection is supported in order
     to support multiple columns mapped under the same attribute.

    :param raiseload: boolean, if True, indicates an exception should be raised
     if the load operation is to take place.

     .. versionadded:: 1.4

     .. seealso::

        :ref:`deferred_raiseload`

    :param \**kw: additional keyword arguments passed to
     :class:`.ColumnProperty`.

    .. seealso::

        :ref:`deferred`