Rails一对多嵌套表单。使用show action controller时，浏览器中是否显示图像？ （使用Paperclip宝石）

Question

我正在尝试创建一个发布表单来发布网址＆amp;图片。嵌套表单提交时没有错误，但我无法在浏览器中显示该表单的后续图像。我已经使用paperclip gem进行图片上传。

发布模型

  class Post < ActiveRecord::Base
   has_many :urls 
   has_many :photos 
   accepts_nested_attributes_for :urls, :photos
  end

网址模型

   class Url < ActiveRecord::Base
    belongs_to :post
   end

照片模特

   class Photo < ActiveRecord::Base
     belongs_to :post 

     has_attached_file :image, styles: { large: "600x600>", thumb: "100x100>" }
     validates_attachment_content_type :image, content_type: /\Aimage\/.*\Z/
 end

帖子控制器

 class PostsController < ApplicationController
  def index
      @posts = Post.all.order(created_at: :desc)
  end

  def show
   @post = Post.find(params[:id])
   @urls = @post.urls 
   @photos = @post.photos 
  end 

  def new
    @post = Post.new 
  end 

 def create
   @post = Post.new(post_params) 
   if @post.save 
     redirect_to @post
   else 
     render 'new'
  end 
 end

     private 
     def post_params 
    params.require(:post).permit(:image, :urls_attributes => [:urlattr])
   end 
  end 

show.html.erb

 <% @urls.each do |url| %>
 <%= url.urlattr %>
 <% end %>

 <% @photos.each do |photo| %>
 <%= image_tag photo.image.url(:large) %>
 <% end %> 

数据库架构

 create_table "photos", force: :cascade do |t|
  t.datetime "created_at",         null: false
  t.datetime "updated_at",         null: false
  t.string   "image_file_name"
  t.string   "image_content_type"
  t.integer  "image_file_size"
  t.datetime "image_updated_at"
  t.integer  "post_id"
 end

 add_index "photos", ["post_id"], name: "index_photos_on_post_id"

 create_table "posts", force: :cascade do |t|
  t.datetime "created_at", null: false
  t.datetime "updated_at", null: false
 end

 create_table "urls", force: :cascade do |t|
  t.string   "urlattr"
  t.datetime "created_at", null: false
  t.datetime "updated_at", null: false
  t.integer  "post_id"
 end

add_index "urls", ["post_id"], name: "index_urls_on_post_id"

end

使用表单发布网址后显示的页面（在表格中输入www.example.com）＆amp;图片（未显示在浏览器中）！[] http://imgur.com/ct0TjHQ

你的帮助会很棒 - 谢谢！