NonValidatingImageCacheBackend and cache invalidation

[dmishe]

It seems that if I use NonValidatingImageCacheBackend then management commands ikcache* do exactly nothing to generate new files. It kind of makes sense, given the purpose of the backend, but in some cases I would like to invalidate and then force generate caches for this backend.

[semente]

I use the following management command to generate new files:

from django.core.management.base import BaseCommand

from galeria.models import Picture


class Command(BaseCommand):
    help = "Generate thumbnails of galeria's pictures."

    def handle(self, *args, **options):
        for p in Picture.objects.public():
            name = p.display_image.name
            storage = p.display_image.source_file.storage
            if name and not storage.exists(name):
                p.display_image.generate(save=True)
                p.thumbnail_image.generate(save=True)
                p.cover_image.generate(save=True)

[matthewwithanm]

I think IK3 (now in the development branch) addresses this, so I'm going to close it. I realize that the NonValidatingImageCacheBackend ended up being kind of kludgy, but I think what you might be looking for is the --force-revalidation flag.

Hopefully IK3—which allows you to specify actions on particular events (source_changed, etc.)—will solve your problem more gracefully.

I'd be very interested in hearing your thoughts about it. Sorry the response was so slow in coming!