如何使用载波向用户发送文件？ [英] How to send file to user with carrierwave?

问题描述

这是我的旧代码，将文件发送到浏览器：

Here's my old code to sends a file to the browser:

def show
  send_file File.join(Rails.root, 'tmp', 'price.xls')
end

但是最近我发现tmp文件夹不能用作Heroku上的永久存储，所以我决定将文件移至AWS S3。

But recently I've found out that tmp folder can't be used as a persistent storage on Heroku, so I decided to move the file to AWS S3.

到目前为止：

def show
  uploader = PriceUploader.new
  uploader.retrieve_from_store!('price.xls')
end

现在，如何将文件发送到浏览器？

Now, how do I send the file to the browser?

更新

我故意没有挂载上传器

推荐答案

弄清楚了。

def show
  uploader = PriceUploader.new
  uploader.retrieve_from_store!('price.xls')
  uploader.cache_stored_file!

  send_file uploader.file.path
end

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