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Polymorphic Nested Form with Paperclip in Rails 3.1.3

class NewsItem < ActiveRecord::Base

  has_many :file_uploads, :as => :uploadable

  accepts_nested_attributes_for :file_uploads, :allow_destroy => true

end

 

 

class FileUpload < ActiveRecord::Base

  belongs_to :uploadable, :polymorphic => true

  has_attached_file :upload, :styles => {:thumb => '100x100>'}

end

       

...

 

<%= f.fields_for :file_uploads do |upload| %>

  <div class="file_upload">

    <%= upload.file_field :upload %>

  </div>

 

  ...

 

<% end %>

 

...

       

{"utf8"=>"✓",

 "authenticity_token"=>"MBfxJ4XTizCXv3Mpu971VHCm60bS3Y84Kdxfe+VJD2w=",

 "news_item"=>{"title"=>"",

 "body"=>"",

 "published_date"=>"",

 "file_uploads_attributes"=>{"0"=>{"upload"=>#<ActionDispatch::Http::UploadedFile:0x000001070112a8 @original_filename="rails-dd352fc2630e5f9aa5685ef1d7fe5997.png",

 @content_type="image/png",

 @headers="Content-Disposition: form-data; name="news_item[file_uploads_attributes][0][upload]"; filename="rails-dd352fc2630e5f9aa5685ef1d7fe5997.png"rnContent-Type: image/pngrn",

 @tempfile=#<File:/var/folders/hb/2bkct63171lck8d3sg0xfq0c0000gn/T/RackMultipart20111204-3216-71in7a>>,

 "name"=>"",

 "caption"=>""}}},

 "commit"=>"Create News item"}