Migrate a django file field to a S3 field

script.py

from django.core.files.base import ContentFile
qs = Category.objects.exclude(image='').exclude(image_s3__isnull=False)
count = 0
total = qs.count()
for obj in qs:
    new_file = ContentFile(obj.image.file.read())
    new_file.name = obj.image.name.split('/')[-1:][0]
    obj.image_s3 = new_file
    obj.save()
    obj.image.file.close()

    count += 1
    print('< ', obj.image.url)
    print('> ', obj.image_s3.url)
    print('{}/{}\n'.format(count, total))