Easily build a great vocabulary without studying! Now on the App Store!
Click here for more info about the app
paperclip is an awesome plugin for rails. it let's you attach an image to any of your models. installation and usage more information is available at http://jimneath.org/2008/04/17/paperclip-attaching-files-in-rails/
by default paperclip uses the image magick library for image manipulation/resizing. you'll need to install this library as well as the ruby api to it in order to use it. on ubuntu using apt get here are the commands
apt-get install imagemagick apt-get install librmagick-ruby1.8