attr_accessible与回形针多图片上传

Question

我在这里遵循了教程，一切都很顺利。直到我尝试将attr_accessible添加到文章模型中。提前感谢。下面是相关代码:

应用程序/模型/user.rb

class User < ActiveRecord::Base
  attr_accessible :name, :email
  has_many :assets, :dependent => :destroy
  accepts_nested_attributes_for :assets, :allow_destroy => true
end

应用程序/模型/asset.rb

class Asset < ActiveRecord::Base
  attr_accessible :user_id, :image
  belongs_to :user
  has_attached_file :image,
    :styles => {
      :thumb=> "100x100#",
      :small  => "300x300>",
      :large => "600x600>"
    }
end

db/schema.rb

  create_table "assets", :force => true do |t|
    t.integer  "user_id"
    t.datetime "created_at"
    t.datetime "updated_at"
    t.string   "image_file_name"
    t.string   "image_content_type"
    t.integer  "image_file_size"
  end
  create_table "users", :force => true do |t|
    t.string   "name"
    t.string   "email"
    t.datetime "created_at"
    t.datetime "updated_at"
  end

app/views/用户/_form.html.erb

<%= form_for(@user, :html => { :multipart => true }) do |f| %>
  <% if @user.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(@user.errors.count, "error") %> prohibited this user from being saved:</h2>
      <ul>
      <% @user.errors.full_messages.each do |msg| %>
        <li><%= msg %></li>
      <% end %>
      </ul>
    </div>
  <% end %>
  <div class="field">
    <%= f.label :name %><br />
    <%= f.text_field :name %>
  </div>
  <div class="field">
    <%= f.label :email %><br />
    <%= f.text_field :email %>
  </div>
  <div class="newPaperclipFiles">
    <%= f.fields_for :assets do |asset| %>
      <% if asset.object.new_record? %>
        <%= asset.file_field :image %>
      <% end %>
    <% end %>
  </div>
  <div class="existingPaperclipFiles">
    <% f.fields_for :assets do |asset| %>
      <% unless asset.object.new_record? %>
        <div class="thumbnail">
          <%= link_to( image_tag(asset.object.image.url(:thumb)), asset.object.image.url(:original) ) %>
          <%= asset.check_box :_destroy %>
        </div>
      <% end %>
    <% end %>
  </div>
  <div class="actions">
    <%= f.submit %>
  </div>
<% end %>

Answer 1

在尝试了各种排列并浏览了相关帖子后，终于抓住了过去几天一直躲着我的小妖精。我所需要的就是将:assets_attributes添加到用户模型中的attr_accessible列表中。感谢阅读!

attr_accessible用于嵌套对象