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Recently I have been working with file uploads quote a bit in Ruby on Rails. In the past I have struggled through the process of allowing a user to upload a file (whether it be an image or a PDF file) from a web form. Let’s just say that this represents one of those occasions that I am glad to be using Ruby on Rails, due mainly to a nice little plugin called “attachment_fu” by Rick Olson. This is a file upload plugin that makes the process of uploading files from web forms almost trivial, and makes the uploading, resizing, and thumbnailing of uploaded images much, much easier.