boards/management/commands/cleanimages.py

import os

from django.core.management import BaseCommand
from django.db import transaction

from boards.models.image import IMAGES_DIRECTORY, PostImage, IMAGE_THUMB_SIZE
from neboard.settings import MEDIA_ROOT


__author__ = 'neko259'


class Command(BaseCommand):
    help = 'Remove image files whose models were deleted'

    @transaction.atomic
    def handle(self, *args, **options):
        count = 0
        thumb_prefix = '.{}x{}'.format(*IMAGE_THUMB_SIZE)

        model_files = os.listdir(MEDIA_ROOT + IMAGES_DIRECTORY)
        for file in model_files:
            image_name = file if thumb_prefix not in file else file.replace(thumb_prefix, '')
            found = PostImage.objects.filter(image=IMAGES_DIRECTORY + image_name).exists()

            if not found:
                print('Missing {}'.format(image_name))
                os.remove(MEDIA_ROOT + IMAGES_DIRECTORY + file)
                count += 1
        print('Deleted {} image files.'.format(count))