archival.ArchiveBox/archivebox/extractor_plugins/singlefile/models.py

from django.db import models

from core.models import ArchiveResult

class SinglefileResultManager(models.Manager):
    def get_queryset(self):
        return super().get_queryset().filter(extractor='singlefile')


class SinglefileResult(ArchiveResult):
    objects = SinglefileResultManager()

    class Meta:
        proxy = True