title: Multiple File Upload with Paperclip error
body: <p>I'm new to rails.
  And to web development at all.</p>
  
  <p>Sorry if some questions might seem dumb.</p>
  
  <p>Trying to follow this screen cast - <a href="http://emersonlackey.com/screencasts/rails-3-with-paperclip.mov" rel="nofollow">http://emersonlackey.com/screencasts/rails-3-with-paperclip.mov</a> </p>
  
  <p>But stopped at the problem - when i try to upload an image i get the following error :</p>
  
  <p><strong>ActiveRecord::UnknownAttributeError in PostsController#update</strong> 
  Unknown attribute: image</p>
  
  <p>altough post_controller.rb seems ok (checked many times - it is the same as <a href="https://github.com/Emerson/Multiple-File-Uploads-with-Paperclip-and-Rails-3" rel="nofollow">https://github.com/Emerson/Multiple-File-Uploads-with-Paperclip-and-Rails-3</a>) :</p>
  
  <p>Tried googlin of course, but didn't find anything.</p>
  
  <p>Has anyone been trough this tutorial and had this problem ?</p>