Uploading multiple files with paperclip
===

I am having problems uploading multiple files using paper clip, 

my models are as such

slider has_many imgarrays

imgarrays has_many imageobjects

imageobjects have_attachment(as for paperclip)


i have no problems recieving a single image and saving it using paperclip on my other models, but i am not sure of how to handle the array returned by imgarrays param during a multiple file upload 

heres my rails server logs

    Started POST "/slider" for 127.0.0.1 at 2012-07-23 10:14:17 +0800
      Processing by SliderController#create as HTML
      Parameters: {"utf8"=>"✓", "authenticity_token"=>"7HcHtSlOsU/bnxb9emhAsSl/GFBraIE6NxwijHl3REM=", "slider"=>{"question"=>"", "answer"=>"", "score"=>"", "industry_name"=>"", 
      "imgarrays"=>[#<ActionDispatch::Http::UploadedFile:0x007fb471e99f30 @original_filename="Icon.png", @content_type="image/png", @headers="Content-Disposition: form-data; name=\"slider[imgarrays][]\"; filename=\"Icon.png\"\r\nContent-Type: image/png\r\n", @tempfile=#<File:/var/folders/2s/n9wb5x4534nfs1cbrlph32v00000gp/T/RackMultipart20120723-53499-1lyi4yf>>, #<ActionDispatch::Http::UploadedFile:0x007fb471e99dc8 @original_filename="Icon@2x.png", @content_type="image/png", @headers="Content-Disposition: form-data; name=\"slider[imgarrays][]\"; filename=\"Icon@2x.png\"\r\nContent-Type: image/png\r\n", @tempfile=#<File:/var/folders/2s/n9wb5x4534nfs1cbrlph32v00000gp/T/RackMultipart20120723-53499-10lala2>>, #<ActionDispatch::Http::UploadedFile:0x007fb471e99d50 @original_filename="greenButton.png", @content_type="image/png", @headers="Content-Disposition: form-data; name=\"slider[imgarrays][]\"; filename=\"greenButton.png\"\r\nContent-Type: image/png\r\n", @tempfile=#<File:/var/folders/2s/n9wb5x4534nfs1cbrlph32v00000gp/T/RackMultipart20120723-53499-or2rdk>>]}, "commit"=>"Create!"}
    Completed 500 Internal Server Error in 18ms
    
    ActiveRecord::AssociationTypeMismatch (Imgarray(#70206507050500) expected, got ActionDispatch::Http::UploadedFile(#70206487229960)):
      app/controllers/slider_controller.rb:12:in `new'
      app/controllers/slider_controller.rb:12:in `create'
    
    Rendered /Users/Kinnovate/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.1.1/lib/action_dispatch/middleware/templates/rescues/_trace.erb (1.4ms)
    Rendered /Users/Kinnovate/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.1.1/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (1.4ms)
    Rendered /Users/Kinnovate/.rvm/gems/ruby-1.9.3-p194/gems/actionpack-3.1.1/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb within rescues/layout (6.5ms)

new.html.erb for slider

    <div>
    <%= form_for @slider ,:url=>"/slider" , :html => { :multipart => true } do |f| %>
        
          <%= f.label :question , "question"%>
          <%= f.text_field :question %>	</br>
    		<%= f.label :answer , "answer array (comma seperated)"%>
    	      <%= f.text_field :answer %>	</br>
    		<%= f.label :score , "score"%>
    	 <%= f.text_field :score %>	</br>
    			<%= f.label :industry_name , "industry"%>
    		      <%= f.text_field :industry_name %>	</br>
    	
    		<%= f.label :attachedimg , "image"%>
    	     <%= f.file_field :imgarrays, :multiple =>:true %>	</br>
    	
          <%= f.submit "Create", class: "btn btn-large btn-primary" %>
        <% end %>
    
    </div>
    <%= link_to 'Cancel', slider_index_path %>