Rails 3.1 CarrierWave error - ruby-on-rails

Question

I followed the tutorial http://railscasts.com/episodes/253-carrierwave-file-uploads?view=asciicast and I've got my nested form setup with the attached inside a nested form below. Everything works fine but the image isn't being uploaded / storing the filename in the db.
<%= simple_nested_form_for(#order) do |f| %>
<%= f.error_notification %>
<div class="inputs">
<label> <%= link_to 'New Customer', new_customer_path %> <small>or</small></label><div class="clear"></div>
<%= f.association :customer, :label =>'Existing Customer', :include_blank => false %>
<%= f.input :due_date, :as => :date, :start_year => Date.today.year, :start_day => Date.today.day, :stary_month => Date.today.month, :order => [:month, :day, :year], :input_html => { :class => 'date' } %>
<%= f.input :sales_tax, :input_html => { :class => 'text', :value => current_user.sales_tax, :onChange=>"itemcalculate()", :id => 'invoice-salestax' }, :hint => '%' %>
<%= f.input :discount, :input_html => { :class => 'text', :onChange=>"itemcalculate()", :id => 'invoice-discount' }, :placeholder => '$30', :label => 'Discount' %>
<%= f.fields_for :lineitems do |item| %>
<div id='size'>
<label style="margin-top:0 !important;">Details</label>
<%= item.input :product_name, :input_html => { :class => 'text' }, :label => false, :wrapper_html => { :class => 'detail-wrapper' }, :input_html => { :class => 'details'}, :hint => 'Product Name', :placeholder => 'Gildan 2000' %>
<%= item.input :color, :input_html => { :class => 'text' }, :label => false, :wrapper_html => { :class => 'detail-wrapper' }, :input_html => { :class => 'details'}, :hint => 'Product Color', :placeholder => 'Blue' %>
<%= item.input :price_per, :input_html => { :class => 'text details', :onChange=>"itemcalculate()", :id => 'invoice-priceper' }, :label => false, :wrapper_html => { :class => 'detail-wrapper' }, :hint => 'Price per', :placeholder => "4.50", :required => true %>
<%= item.input :extra_fee, :input_html => { :class => 'text details', :onChange=>"itemcalculate()", :id => 'invoice-extrafee' }, :label => false, :wrapper_html => { :class => 'detail-wrapper', :value => '0' }, :hint => 'Extra fee', :required => true %>
<div class='clear'></div>
<label>Sizes</label>
<%= item.input :xxs, :input_html => { :class => 'sizes', :value => '0', :onChange=>"itemcalculate()", :id => 'invoice-xxs' }, :hint=> 'xxs', :label => false, :wrapper_html => { :class => 'size-wrapper' } %>
<%= item.input :xs, :input_html => { :class => 'sizes', :value => '0', :onChange=>"itemcalculate()", :id => 'invoice-xs' }, :hint=> 'xs', :label => false, :wrapper_html => { :class => 'size-wrapper' } %>
<%= item.input :s, :input_html => { :class => 'sizes', :value => '0', :onChange=>"itemcalculate()", :id => 'invoice-s' }, :hint=> 's' , :label => false, :wrapper_html => { :class => 'size-wrapper' }%>
<%= item.input :m, :input_html => { :class => 'sizes', :value => '0', :onChange=>"itemcalculate()", :id => 'invoice-m' }, :hint=> 'm', :label => false, :wrapper_html => { :class => 'size-wrapper' } %>
<%= item.input :l, :input_html => { :class => 'sizes', :value => '0', :onChange=>"itemcalculate()", :id => 'invoice-l' }, :hint=> 'l', :label => false, :wrapper_html => { :class => 'size-wrapper' } %>
<%= item.input :xl, :input_html => { :class => 'sizes', :value => '0', :onChange=>"itemcalculate()", :id => 'invoice-xl' }, :hint=> 'xl', :label => false, :wrapper_html => { :class => 'size-wrapper' } %>
<%= item.input :xxl, :input_html => { :class => 'sizes', :value => '0', :onChange=>"itemcalculate()", :id => 'invoice-xxl' }, :hint=> 'xxl', :label => false, :wrapper_html => { :class => 'size-wrapper' } %>
<label>Extra Notes</label>
<%= item.text_area :extra_notes %>
<!-- start image upload -->
<%= item.fields_for :images, :html => {:multipart => true} do |image| %>
<%= f.file_field :image %>
<%= image.link_to_remove "Remove Image", :id => 'remove-image' %>
<% end %>
<%= item.link_to_add "<img src='/images/icon-camera.png' id='camera-icon'/> Add an image".html_safe, :images, :id=> 'add-image' %>
<!-- end image upload -->
<div class='clear'></div>
<%= item.link_to_remove "Remove Item" %>
</div>
<% end %>
<p id='add-new-item'><%= f.link_to_add "+ Add an Item", :lineitems %></p>
</div>
<%= f.hidden_field :user_id, :value => current_user.id %>
<div class="actions">
<%= f.button :submit %>
</div>
<% end %>
I'm getting the error WARNING: Can't mass-assign protected attributes: image
WARNING: Can't mass-assign protected attributes: images_attributes
My Image model looks like this:
class Image < ActiveRecord::Base
attr_accessible :lineitem_id, :image
belongs_to :lineitem, :polymorphic => true
mount_uploader :image, ImageUploader
end
# == Schema Information
#
# Table name: images
#
# id :integer not null, primary key
# lineitem_id :integer
# image :string(255)
# created_at :datetime
# updated_at :datetime
#
Any idea what's wrong?

Answer 1

in your image upload section, i think you want
<%= image.file_field :image %>
instead of
<%= f.file_field :image %>
sounds/looks like you're trying to tack the image file field onto the orders form when it should be part of the nested form you created for the image.

Answer 2

I guess this line:
attr_accessible :lineitem_id, :image
prevents your image from saving. You should fix/improve this definition, so it accepts other parameters as well, when mass assigning.

Answer 3

use something like this, since im not using active record some stuff its missing.. but you should be able to adapt it to your needs..
class LineItem
attr_accessible :images_attributes
has_many :images
accepts_nested_attributes_for :images, :allow_destroy => true
end
class Image
attr_accessible :lineitem_id, :image
belongs_to :lineitem, :polymorphic => true
mount_uploader :image, ImageUploader
end
that should work

Answer 4

You need add :remove_image to attr_accessible.