如何将文件导入 Carrierwave
所以我有一个使用 Rails 3 和 mongodb 来提供文件服务的应用程序。我想使用运行程序进程将所有文件导入到 gridfs 中，而不为系统中已有的文件创建新的 ObjectId。本质上，我想使用 Carrierwave 将文件附加到数据库中已有的文件对象。
由于某种原因，当我创建新的文件文档时，我可以毫无问题地附加本地文件。但是，我无法将本地文件附加到之前创建的文档中。
我已经尝试了 Mongoid 的每种更新形式，每次我都会遇到方法丢失或无法识别的方法。
例如，这可行：
somefile = Upload.new(
:name => "somefile.ext"
)
somefile.upload = File.open("/foo/bar.ext")
somefile.save!
但这不行：
somefile = Upload.first(:conditions => {:name => "somefile.ext"})
somefile.upload = File.open("/foo/bar.ext")
somefile.save!
有什么想法吗？
So I have an app using rails 3 and mongodb that serves files. I want to import all of the files into gridfs using a runner process without creating new ObjectId's for the files already in the system. Essentially, I want to attach the files using carrierwave to the file object already in the database.
For some reason, when I create a new file document, I can attach a local file without a problem. I can't, however, attach a local file to a document that's been previously created.
I've tried every form of Mongoid's update, and every time I get a method missing or unidentified method.
So for example, this works:
somefile = Upload.new(
:name => "somefile.ext"
)
somefile.upload = File.open("/foo/bar.ext")
somefile.save!
But this doesn't:
somefile = Upload.first(:conditions => {:name => "somefile.ext"})
somefile.upload = File.open("/foo/bar.ext")
somefile.save!
Any ideas?
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您可以通过这种方式为现有对象保存新文件：
如您所见，
意味着
You can save new file for existing object in this way:
As you can see,
means