Classe « TypeDecorator »

Méthode sqlalchemy.TypeDecorator.process_result_value

Signature de la méthode process_result_value

def process_result_value(self, value, dialect) 

Description

process_result_value.__doc__

Receive a result-row column value to be converted.

        Subclasses should implement this method to operate on data
        fetched from the database.

        Subclasses override this method to return the
        value that should be passed back to the application,
        given a value that is already processed by
        the underlying :class:`.TypeEngine` object, originally
        from the DBAPI cursor method ``fetchone()`` or similar.

        The operation could be anything desired to perform custom
        behavior, such as transforming or serializing data.
        This could also be used as a hook for validating logic.

        :param value: Data to operate upon, of any type expected by
         this method in the subclass.  Can be ``None``.
        :param dialect: the :class:`.Dialect` in use.

        This operation should be designed to be reversible by
        the "process_bind_param" method of this class.