title: The GEM paperclip saved my images in public/system not in app/assets/images
body: <p>I am using the gem PaperClip for upload images to my server , but the images are stored in public/system
  I need to change this ubication to app/assets/images</p>
  
  <pre><code>class User &lt; ActiveRecord::Base
    attr_accessible :email, :name,:photo
  
    validates :name, :presence =&gt; true    
    validates :email, :presence =&gt; true
    has_attached_file :photo, :styles =&gt; 
             { :medium =&gt; "300x300&gt;", :thumb =&gt; "100x100&gt;" }
  
  end
  </code></pre>
  
  <p>I found this tutorial of RailsCasts where these options are declared</p>
  
  <pre><code>has_attached_file :photo, :styles =&gt; { :small =&gt; "150x150&gt;" },
                    :url  =&gt; "/assets/products/:id/:style/:basename.:extension",
                    :path =&gt; ":rails_root/public/assets/products/:id/:style/:basename.:extension"
  
  validates_attachment_presence :photo
  validates_attachment_size :photo, :less_than =&gt; 5.megabytes
  validates_attachment_content_type :photo, :content_type =&gt; ['image/jpeg', 'image/png']
  </code></pre>