如何在亚马逊s3 Paperclip中复制文件？

Question

我的模型Shop有一个logo，它存储在亚马逊s3中，我想将它复制到另一个模型Company，我只是这样做：

shop = Shop.find(1)
company = Company.find(1)
company.logo = shop.logo
company.save!

但它给出了一个错误：

[paperclip] copying logos/1/original/220px-Bart_Simpson.png to local file /tmp/dac9e3329951078b23c5deed39f3193120160107-30855-ivrdms.png
No Such Key - cannot copy logos/1/original/220px-Bart_Simpson.png to local file /tmp/dac9e3329951078b23c5deed39f3193120160107-30855-ivrdms.png
Command :: file -b --mime '/tmp/dac9e3329951078b23c5deed39f3193120160107-30855-nz0h5c.png'
[paperclip] Content Type Spoof: Filename 220px-Bart_Simpson.png (["image/png"]), content type discovered from file command: inode/x-empty. See documentation to allow this combination.

ROLLBACK
ActiveRecord::RecordInvalid: Validation failed: Logo has an extension that does not match its contents

有人可以说这到底是怎么回事，或者怎么做？

Answer 1

你可以尝试，我可以知道正在使用哪个版本的回形针。

shop = Shop.find(1)
company = Company.find(1)
company.logo = File.open(shop.logo.path, 'rb')
company.save!