ruby on rails - using fields_for & paperclip multiple file update -


i 'm trying upload multiple files s3 using paperclip gem , referring this tutorial. 'm having 2 issues 1. upload tag rendered once instead of 6 times specified in controller. 2. , secondly following error whenever try edit document.

activerecord::unknownattributeerror in documentscontroller#edit

unknown attribute: document_id

any suggestions how fix this?

models/document.rb

class document < activerecord::base   attr_accessible :documentid, :name, :notes, :user_id    belongs_to :user   has_many :photos, :dependent=>:destroy   accepts_nested_attributes_for :photos    acts_as_taggable    validates :name, :length => {:minimum =>3}   validates_date :dtreminder, :on_or_after => lambda { date.current }, :allow_blank => true     validates_associated :user   validates_uniqueness_of :name, :scope => :user_id end

models/photo.rb

class photo < activerecord::base   belongs_to :document     has_attached_file :image, :style =>{:thumb => '150x150#',           :medium => '300x300>',           :large => '600x600>'   }    validates_attachment_size :photo, :less_than => 500.kilobytes  end

controller/document_controller.rb

    def new         @document = document.new         @document.user = current_user         5.times {@document.photos.build}          respond_to |format|           format.html # new.html.erb           format.json { render json: @document }         end       end  def create     @document = document.new(params[:document])     @document.user = current_user     5.times {@document.photos.build}      respond_to |format|       if @document.save         format.html { redirect_to user_documents_path(current_user), notice: 'document created.' }         format.json { render json: @document, status: :created, location: @document }       else         format.html { render action: "new" }         format.json { render json: @document.errors, status: :unprocessable_entity }       end     end   end

views/documents/_form.html.erb

<%= form_for(document) |f| %>          <table>                 <tr>                         <td><%= f.label :name %></td>                         <td><%= f.text_field :name %></td>                 </tr>                 <tr>                         <td><%= f.label :notes  %></td>                         <td><%= f.text_area :notes %></td>                 </tr>                 <tr>                                          <td>photos</td>                         <td>                                 <%= fields_for :photos |photo|%>                                         <%= photo.file_field :image%>                                 <%end%>                         </td>                  </tr>                 <tr>                         <td></td>                         <td><%= f.submit %></td>                 </tr>         </table> <% end %>

for multiple image uploading fields, checkout ryan bate's screencasts on similar subject.

http://railscasts.com/episodes/73-complex-forms-part-1

http://railscasts.com/episodes/74

http://railscasts.com/episodes/75


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