Rails erreur de routage

Question

J'ai créé une petite application appelée plis auxquels j'ai assigné quelques paramètres. J'ai décidé que je voulais ajouter une photo à chaque pli et suis allé à travers un tutoriel pour trombone.

Alors maintenant, j'ai installé paperclip et ImageMagick, et quand je modifier un pli, je peux choisir une image de mon disque dur, et quand je clique sur le volet de mise à jour j'obtenir une erreur de routage qui dit

Routing erreur

No route matches "/folds/2/edit" 

Je suis très nouveau à cela, que puis-je ajouter cela me obtenir une réponse claire? Itinéraires de râteau?

fold_comments GET /folds/:fold_id/comments(.:format)   {:action=>"index", :controller=>"comments"} 
fold_comments POST /folds/:fold_id/comments(.:format)   {:action=>"create", :controller=>"comments"} 
new_fold_comment GET /folds/:fold_id/comments/new(.:format)  {:action=>"new", :controller=>"comments"} 
edit_fold_comment GET /folds/:fold_id/comments/:id/edit(.:format) {:action=>"edit", :controller=>"comments"} 
fold_comment GET /folds/:fold_id/comments/:id(.:format)  {:action=>"show", :controller=>"comments"} 
fold_comment PUT /folds/:fold_id/comments/:id(.:format)  {:action=>"update", :controller=>"comments"} 
fold_comment DELETE /folds/:fold_id/comments/:id(.:format)  {:action=>"destroy", :controller=>"comments"} 
     folds GET /folds(.:format)       {:action=>"index", :controller=>"folds"} 
     folds POST /folds(.:format)       {:action=>"create", :controller=>"folds"} 
    new_fold GET /folds/new(.:format)      {:action=>"new", :controller=>"folds"} 
    edit_fold GET /folds/:id/edit(.:format)     {:action=>"edit", :controller=>"folds"} 
     fold GET /folds/:id(.:format)      {:action=>"show", :controller=>"folds"} 
     fold PUT /folds/:id(.:format)      {:action=>"update", :controller=>"folds"} 
     fold DELETE /folds/:id(.:format)      {:action=>"destroy", :controller=>"folds"} 
    home_index GET /home/index(.:format)      {:controller=>"home", :action=>"index"} 
     root  /(.:format)         {:controller=>"home", :action=>"index"} 

fold.rb?

class Fold < ActiveRecord::Base 
validates :model, :presence => true 
validates :folder, :presence => true 
has_many :comments, :dependent => :destroy 
has_attached_file :photo, :styles => { :small => "150x150>" }, 
       :url => "/assets/folds/:id/:style/:basename.:extension", 
       :path => ":rails_root/public/assets/folds/:id/:style/:basename.:extension", 
       :dependent => :destroy 
validates_attachment_presence :photo 
validates_attachment_size :photo, :less_than => 5.megabytes 
validates_attachment_content_type :photo, :content_type => ['image/jpeg', 'image/png'] 
end 

routes.rb

Folds::Application.routes.draw do 
    resources :folds do 
resources :comments 
    end 
    get "home/index" 
end 

_form.html.erb

<%= form_for :fold, :html => { :multipart => true } do |f| %> 
<% if @fold.errors.any? %> 
<div id="error_explanation"> 
    <h2><%= pluralize(@fold.errors.count, "error") %> prohibited this fold from being saved:</h2> 
    <ul> 
    <% @fold.errors.full_messages.each do |msg| %> 
    <li><%= msg %></li> 
    <% end %> 
    </ul> 
</div> 
<% end %> 
<div class="field"> 
<%= f.label :model %><br /> 
<%= f.text_field :model %> 
</div> 
<div class="field"> 
<%= f.file_field :photo_file_name %> 
</div> 
<div class="field"> 
<%= f.label :folder %><br /> 
<%= f.text_field :folder %> 
</div> 
<div class="field"> 
<%= f.label :base %><br /> 
<%= f.text_field :base %> 
</div> 
<div class="field"> 
<%= f.label :creator %><br /> 
<%= f.text_field :creator %> 
</div> 
<div class="field"> 
<%= f.label :body %><br /> 
<%= f.text_area :body %> 
</div> 
<div class="field"> 
<%= f.label :fold_id %><br /> 
<%= f.text_field :fold_id %> 
</div> 
<div class="field"> 
<%= f.label :diagram %><br /> 
<%= f.text_field :diagram %> 
</div> 
<div class="actions"> 
<%= f.submit %> 
</div> 
<% end %> 

Answer 1

Si vous modifiez la 1ère ligne de vue pour

<%= form_for @fold, :html => { :multipart => true } do |f| %> 

et changer

<%= f.file_field :photo_file_name %> 

à

<%= f.file_field :photo %>