def get_queryset(self):
        query_set = super(MediaFileManager, self).get_queryset().exclude(
            status=MEDIA_STATUS.deleted
        )
        return query_set.select_subclasses()
.. todo::
dataset/ETHPy150Open ExCiteS/geokey/geokey/contributions/managers.py/MediaFileManager.get_queryset--crossover with--dataset/ETHPy150Open lisa-lab/pylearn2/pylearn2/sandbox/cuda_convnet/response_norm.py/CrossMapNormUndo.as_inplace