ruby-on-rails - Render a Markdown file stored in S3 uploaded with shrine - Rails

Question

I'm using shrine to upload files from my rails application to S3. All is working fine, but I dont know how to display that file using redcarpet gem.

For example I can do this:

<div>
    <%= markdown("##title
    * ") %>
</div>

And works fine.

But if I do this:

<%= markdown(@rfile.rfile.url) %>

Is showing me a download link from S3.

How I can get the file content and not the file link?

Answer 1

调用@rfile.rfile返回一个Shrine::UploadedFile对象，它有许多更方便的方法，而不仅仅是#url. 在这种方法上是#read，它检索文件的内容：

<%= markdown(@rfile.rfile.read) %>

但是，在这种情况下，文件将被打开和读取，但不会关闭。所以最好#open用块来调用，并调用#read产生的 IO 对象，可以整齐地写成

<%= markdown(@rfile.rfile.open(&:read)) %>