def METHOD_NAME(
    self, force_insert=False, force_update=False, using=None, update_fields=None
):
    if not self.filename:
        self.filename = self.generate_filename()
    return super().METHOD_NAME(
        force_insert=force_insert,
        force_update=force_update,
        using=using,
        update_fields=update_fields,
    )