CarrierWave有着惊人的文档，直到你需要做它没有一个模型！

我有我的上传和雾设置中设置了，他们都使用一个模型安装的上传时正常工作，但现在我想这样做，没有一个模型。

我有这样的：

 上传= CsvUploader.new
 一些= uploader.store！（File.read（FILE_PATH））
 uploader.retrieve_from_store！（self.file_name）
 

当我打电话.store！在code立即运行这是奇怪的，因为它应该需要几秒钟上传的文件？

再经过我打电话.retrieve_from_store！上载对象拥有所有正确的S3的信息，如完整的URL之类的东西。

不过，美其名曰：

  uploader.file.exists？
 

返回false。和浏览S3网址从S3返回未找到关键错误。

那么，我究竟做错了什么？要重申的是，它的工作原理在安装时，所以我不认为这是我的雾设置。

我的上传：

 类CsvUploader＆LT; CarrierWave ::上传::基地
  ＃选择使用此上传什么样的存储：
  存储：雾

  ＃覆盖的地方上传的文件将被存储在目录中。
  ＃这是一个合理的默认为是为了安装上传者：
  包括CarrierWave :: MIMETYPES
  过程：set_content_type

  高清store_dir
    上传/公/ extranet_csvs
  结束

  高清的cache_dir
    / tmp目录/上传
  结束

  ＃添加被允许上载的扩展的白名单。
  ＃对于图像，你可以使用这样的事情：
  高清extension_white_list
    ％W（CSV）
  结束
结束
 

解决方案

我想你想 File.open方法而不是 File.read 。后者返回原始的字符串，这CarrierWave不知道如何存储。

 上传= CsvUploader.new
File.open方法（FILE_PATH）办|文件|
  东西= uploader.store！（文件）
结束
uploader.retrieve_from_store！（self.file_name）
 

这很可能会在文档更清晰，但我通过检查规范的。令人失望的是CarrierWave失败默默的在这里。

CarrierWave has amazing documentation, until you need to do it without a model!

I have my uploader and fog settings set up, and they all work fine when using the mounted uploader on a model, but now I want to do it without a model.

I have this:

 uploader = CsvUploader.new
 something = uploader.store!(File.read(file_path))
 uploader.retrieve_from_store!(self.file_name)

When I call .store! the code runs immediately which is weird since it should take a few seconds to upload the file?

Then after I call .retrieve_from_store! the uploader object has all the correct S3 info, like the full urls and stuff.

However, calling:

uploader.file.exists?

returns false. And browsing the s3 urls return a key not found error from s3.

So, what am I doing wrong?? To reiterate, it works when mounted so I don't think it's my fog settings.

My uploader:

class CsvUploader < CarrierWave::Uploader::Base
  # Choose what kind of storage to use for this uploader:
  storage :fog

  # Override the directory where uploaded files will be stored.
  # This is a sensible default for uploaders that are meant to be mounted:
  include CarrierWave::MimeTypes
  process :set_content_type

  def store_dir
    "uploads/public/extranet_csvs"
  end

  def cache_dir
    "/tmp/uploads"
  end

  # Add a white list of extensions which are allowed to be uploaded.
  # For images you might use something like this:
  def extension_white_list
    %w(csv)
  end
end

I think you want File.open instead of File.read. The latter returns a raw string, which CarrierWave doesn't know how to store.

uploader = CsvUploader.new
File.open(file_path) do |file|
  something = uploader.store!(file)
end
uploader.retrieve_from_store!(self.file_name)

This could probably be clearer in the docs, but I confirmed it by checking the specs. Bummer that CarrierWave is failing silently here.