title: Where can I save uploaded files in Rails?
body: <p>I've tried to find the documentation file handling in Rails, without success. Here's the link to the File class (specified by the docs for file_filed_tag):
  <a href="http://api.rubyonrails.org/classes/File.html" rel="nofollow">http://api.rubyonrails.org/classes/File.html</a></p>
  
  <p>I figure there's got to be a better set of source docs. My main question is about where can I save a file that is not publicly accessible. I'm interested in using file uploaded files temporarily for "wizard" like purposes for users.</p>