Question

I am reading this tutorial : http://sleekd.com/general/adding-multiple-images-to-a-rails-model-with-paperclip/
because i need Save the product images in a independent model. However when Product.create execute don´t save the data for product images model.

NOTE: I use the new pack action because i need to use ajax for create a new product.

Please I need Help.

My Code

Controllers

    class Admin::PacksController < ApplicationController
      def new
        @pack = Pack.new
        @product = Product.new
        4.times {@product.product_images.build} # added this
        respond_to do |format|
          format.html # new.html.erb
          format.xml  { render :xml => @pack }
        end
      end

      def create_starred_product
        product = Product.new(params[:product])
        product.save
...

      end

View

<% form_remote_for @product, :url => {:controller => "products", :action => "create_starred_product"}, :html => {:multipart => true} do |f| %>
      <div id="content">
....#OTHER FIELDS OF PRODUCT. ITS SAVE METHOD IS OK
        <div id="images-selector">
          <span class="fleft">Imágenes</span><br/>
          <% count = 0 %>
          <% f.fields_for :product_images do |builder| %>

              <% if builder.object.new_record? %>
                  <label>
                    Imagen <%= "#{count = count + 1}" %>
                  </label>
                  <%= builder.file_field :photo, :class => "textarea" -%><br/>
              <% end %>
          <% end %>
        </div>
        <p><%= f.submit "Crear" %></p>
      </div>
  <% end %>

Models

class Product < ActiveRecord::Base
  has_many :packs, :through => :pack_products
  has_many :product_images, :dependent => :destroy
  #PAPERCLIP
  accepts_nested_attributes_for :product_images, :reject_if => lambda { |t| t['product_image'].blank? }
end

class ProductImage < ActiveRecord::Base
  belongs_to :product
  has_attached_file :photo, :url => "/:attachment/:class/:id/:style_:basename.:extension", :styles => { :medium => "300x300>", :thumb => "100x100>", :small => "30x30>" }
end  

Answer 1

You can’t upload files using AJAX, just like you said. There are, however, alternate solutions.

The common technique to accomplish this is the usage of an iframe. Have a look here, this tutorial is oriented towards attachment_fu but it’ll work with paperclip as well. Uploadify is worth checking out and can also be used with paperclip on rails 2.3 and rails 3.