可以上傳，但使用回形針和AWS S3

Question

S3憑據正確配置回形針在Heroku無法刪除圖像：

# production.rb (same in development.rb) 
config.paperclip_defaults = { 
    :storage => :s3, 
    :path => 'photos/:id/:style/:filename', 
    :s3_credentials => { 
    :bucket => ENV['aws_bucket'], 
    :access_key_id => ENV['aws_access_key'], 
    :secret_access_key => ENV['aws_secret_key'] 
    } 
} 

我看到在Heroku的UI設置環境變量，我可以上傳照片就好了。

然而，當我試圖摧毀生產給定的模型，我得到這個錯誤日誌中：

2016-01-14T15:48:48.079923+00:00 app[web.1]: Completed 500 Internal Server Error in 591ms (ActiveRecord: 60.3ms) 
2016-01-14T15:48:48.082519+00:00 app[web.1]: 
2016-01-14T15:48:48.082522+00:00 app[web.1]: AWS::Errors::MissingCredentialsError (
2016-01-14T15:48:48.082523+00:00 app[web.1]: Missing Credentials. 
2016-01-14T15:48:48.082524+00:00 app[web.1]: 
2016-01-14T15:48:48.082525+00:00 app[web.1]: Unable to find AWS credentials. You can configure your AWS credentials 
2016-01-14T15:48:48.082526+00:00 app[web.1]: a few different ways: 
2016-01-14T15:48:48.082526+00:00 app[web.1]: 
2016-01-14T15:48:48.082527+00:00 app[web.1]: * Call AWS.config with :access_key_id and :secret_access_key 
2016-01-14T15:48:48.082528+00:00 app[web.1]: 
2016-01-14T15:48:48.082529+00:00 app[web.1]: * Export AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY to ENV 
2016-01-14T15:48:48.082529+00:00 app[web.1]: 
2016-01-14T15:48:48.082530+00:00 app[web.1]: * On EC2 you can run instances with an IAM instance profile and credentials 
2016-01-14T15:48:48.082531+00:00 app[web.1]: will be auto loaded from the instance metadata service on those 
2016-01-14T15:48:48.082531+00:00 app[web.1]: instances. 
2016-01-14T15:48:48.082532+00:00 app[web.1]: 
2016-01-14T15:48:48.082533+00:00 app[web.1]: * Call AWS.config with :credential_provider. A credential provider should 
2016-01-14T15:48:48.082533+00:00 app[web.1]: either include AWS::Core::CredentialProviders::Provider or respond to 
2016-01-14T15:48:48.082534+00:00 app[web.1]: the same public methods. 

這一切工作就好了當地太（顯然是在利用不同的S3桶）。有什麼問題？即使上傳工作正常，我爲什麼僅在生產中獲得AWS::Errors::MissingCredentialsError？

Answer 1

您可能想要確保您使用的是aws-sdk gem v1而不是aws-sdk v2。日誌使它看起來像你在v1（「AWS ::」） - 如果你在aws-sdk v2上，paperclip將不起作用。不要以爲thinkbot會繼續支持它，我建議你直接上傳到s3使用jquery-file-uploader（https://devcenter.heroku.com/articles/direct-to-s3-image-uploads-in-rails#pre-signed-post） - 請注意，文章不顯示aws-sdk-v2說明。下面鏈接的答案確實使用AWS-SDK-V2：

Rails direct to S3 upload using aws-sdk gem and jQuery-File-Upload on heroku