相关疑难解决方法(0)

我通过s3boto将Amazon S3用作存储后端。我有一个带有ImageField的Image模型。通过管理员上传图像后，该图像将成功上传到S3。我现在想做的是使用Pillow创建缩略图后保存。我已经通过在其上调用show（）方法验证了缩略图已创建，但是由于某种原因它没有被上传到S3。我认为我的保存方式可能​​是错误的-任何建议请多加赞赏。

task.py

from celery import shared_task
from .models import Image
import os
from django.core.files.storage import default_storage as storage
from PIL import Image as PillowImage

@shared_task
def create_thumbnails(pk):
    try:
        image = Image.objects.get(pk=pk)
    except Image.ObjectDoesNotExist:
        pass
    thumbnail_size = (450,200)
    filename, ext = os.path.splitext(image.image.name)
    try:
        fh = storage.open(image.image.name, 'r')
        im = PillowImage.open(fh)
        im.thumbnail(thumbnail_size)
        im.show() # TEST - This opens the resized image in Preview on my mac
        filename = filename +'_thumbnail' +ext
        new_file = storage.open(filename, 'w')
        im.save(new_file, "PNG")
        new_file.close()
    except IOError as …