title: trouble getting carrierwave to work
body: <p>I am not sure if the image uploads just aren't saving or if I am saving them in the wrong place or what's wrong..  right now when I generate the image tag with this code:</p>
  
  <pre><code>&lt;%= image_tag @photo.image_url.to_s %&gt;
  </code></pre>
  
  <p>it just throws a routing error:</p>
  
  <pre><code>No route matches "/images"
  </code></pre>
  
  <p>am I suppose to set up this route?..  I was following the tut on railscasts.org
  anyway here is some more relevant code:</p>
  
  <pre><code>&lt;%= form.file_field :image %&gt; #in the form
  
  mount_uploader :image, ImageUploader  #in the model Photo
  
  #in the image_uploader file
  def store_dir
  "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
  end
  
  #also nothing special going on in the controller
  def create
  @photo = Photo.new(params[:photo])
  
  respond_to do |format|
    if @photo.save
      format.html { redirect_to(@photo, :notice =&gt; 'Photo was successfully created.') }
      format.xml  { render :xml =&gt; @photo, :status =&gt; :created, :location =&gt; @photo }
    else
      format.html { render :action =&gt; "new" }
      format.xml  { render :xml =&gt; @photo.errors, :status =&gt; :unprocessable_entity }
    end
  end
  end
  </code></pre>