Django 应用程序不从 AWS 存储桶的媒体文件夹加载图像

我在用着django-oscar，并希望使用 AWS S3 提供我的静态文件。 为了配置我的 s3 存储桶，我创建了一个名为的模块aws with conf.py and utils.py files.

在我的网站上，当我将图像上传到产品时，它会以正确的路径上传到我的 aws s3 存储桶，但在很短的时间之后，路径会从https://mybucketname.s3.amazonaws.com/media/cache/..../image.jpg to https://mybucketname.s3.amazonaws.com/cache/..../image.jpg

图像位于media我的桶里的文件夹。

我在 heroku 上托管我的网络应用程序，静态文件服务正确，但问题发生在媒体文件夹中。

这是我的代码 -

utils.py 文件

from storages.backends.s3boto3 import S3Boto3Storage

StaticRootS3BotoStorage = lambda: S3Boto3Storage(location='static')
MediaRootS3BotoStorage  = lambda: S3Boto3Storage(location='media')

as static and media是我的 s3 存储桶上的文件夹

conf.py

import datetime

AWS_ACCESS_KEY_ID = "xxx"
AWS_SECRET_ACCESS_KEY = "yyy"

AWS_PRELOAD_METADATA = True
AWS_QUERYSTRING_AUTH = False
AWS_DEFAULT_ACL = None 

DEFAULT_FILE_STORAGE = 
'myproject.aws.utils.MediaRootS3BotoStorage'
STATICFILES_STORAGE = 
'myproject.aws.utils.StaticRootS3BotoStorage'
AWS_STORAGE_BUCKET_NAME = 'mybucket-name'
S3DIRECT_REGION = 'us-east-2'
S3_URL = '//%s.s3.amazonaws.com/' % AWS_STORAGE_BUCKET_NAME
MEDIA_URL = '//%s.s3.amazonaws.com/media/' % AWS_STORAGE_BUCKET_NAME
MEDIA_ROOT = MEDIA_URL
STATIC_URL = S3_URL + 'static/'
ADMIN_MEDIA_PREFIX = STATIC_URL + 'admin/'

two_months = datetime.timedelta(days=61)
date_two_months_later = datetime.date.today() + two_months
expires = date_two_months_later.strftime("%A, %d %B %Y 20:00:00 
GMT")

AWS_HEADERS = { 
    'Expires': expires,
    'Cache-Control': 'max-age=%d' % 
    (int(two_months.total_seconds()), ),
}

和我的 settings.py 我添加了这个

from myproject.aws.conf import *

我应该怎么做才能解决这个问题？

The file storage system configured for your Django app should be a class that implements django.core.files.storage.Storage ^{[1] https://docs.djangoproject.com/en/2.1/howto/custom-file-storage/#writing-a-custom-storage-system}

storages.backends.s3boto3.S3Boto3Storage already implements this storage interface. ^{[2] https://github.com/jschneier/django-storages/blob/1.7.1/storages/backends/s3boto.py#L186}

Setting StaticRootS3BotoStorage in utils.py to a lambda, the Storage system is instantiated lazily with the proper location value; but the location attribute in the storage class itself is never changes. ^{[3] https://github.com/jschneier/django-storages/blob/1.7.1/storages/backends/s3boto.py#L216}

location = setting('AWS_LOCATION', '')

Django clears properties of storage instance when the project settings changes. ^{[4] https://github.com/django/django/blob/2.1.4/django/core/files/storage.py#L180} So that when the location attribute is resolved on the storage system, it effectively looks up the class attribute one (location value is shown in above snippet) because location attribute is missing in the instance.

这种情况可以通过子类化来解决storages.backends.s3boto3.S3Boto3Storage反而。这保证了location无论项目设置如何更改，值都不会改变。

class StaticRootS3BotoStorage(S3Boto3Storage):
    location = 'static'

class MediaRootS3BotoStorage(S3Boto3Storage):
    location = 'media'