helpers.py 文件源码

def filter_single_or_404(model: t.Type[Y], *criteria: t.Any) -> Y:
    """Get a single object of the specified model by filtering or raise an
    exception.

    .. note::
        ``Y`` is bound to :py:class:`psef.models.Base`, so it should be a
        SQLAlchemy model.

    :param model: The object to get.
    :param criteria: The criteria to filter with.
    :returns: The requested object.

    :raises APIException: If no object with the given id could be found.
        (OBJECT_ID_NOT_FOUND)
    """
    return t.cast(Y, _filter_or_404(model, False, criteria))