回形针 - 删除Amazon S3的文件？ [英] Paperclip - delete a file from Amazon S3?

问题描述

我需要能够从由用户，如个人资料照片存储S3删除文件。只需调用 @ user.logo.destroy 似乎并没有这样的伎俩 - 我得到 [回形针]保存附件在日志和文件保持正确的，在S3的桶中。

I need to be able to delete files from S3 that are stored by users, such as profile photos. Just calling @user.logo.destroy doesn't seem to do the trick - I get [paperclip] Saving attachments. in the logs and the file stays right there in the S3 bucket.

如何在文件本身被删除？

How can the file itself be removed?

推荐答案

此是从回形针，可用于除去附着物的方法：

This are the methods from Paperclip that can be used to remove the attachments:

module Paperclip
  class Attachment
    # Clears out the attachment. Has the same effect as previously assigning  
    # nil to the attachment. Does NOT save. If you wish to clear AND save,
    # use #destroy.
    def clear
      queue_existing_for_delete
      @errors            = {}
    end

    # Destroys the attachment. Has the same effect as previously assigning
    # nil to the attachment *and saving*. This is permanent. If you wish to
    # wipe out the existing attachment but not save, use #clear.
    def destroy
      clear
      save
    end

所以你看，破坏只删除附件，如果没有发生错误。我试图用我自己的设置对S3，所以我知道，破坏作品。

So you see, destroy only removes the attachment if no error occurs. I have tried it with my own setup against S3 so I know that destroy works.

难道这个问题，你的情况可能是，你有什么验证能够消除保存？即validates_attachment_ presence或类似的东西？

Could the problem in your case possible be that you have any validations that cancels the save? I.e validates_attachment_presence or something similar?

我想找出是尝试@ user.logo.destroy，然后检查@ user.errors的内容，看它是否报告任何错误信息的一种方式。

I think one way to find out would be to try @user.logo.destroy and then check the content of @user.errors to see if it reports any error messages.

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