回形针和茧,图像未保存

时间:2014-03-12 02:50:14

标签: ruby-on-rails paperclip nested-attributes cocoon-gem

我有物品型号

class Item < ActiveRecord::Base
  has_many :images, dependent: :destroy
  accepts_nested_attributes_for :images, :allow_destroy => true
end

和图像模型

class Image < ActiveRecord::Base
  belongs_to :item
  has_attached_file :picture, :styles => {:medium => "600x600>", :thumb => "100x100>"},       :default_url => "/images/:style/missing.png"
end

在控制器中,强参数

def item_params
  params.require(:item).permit(:name, :description, :price, images_attributes: [:picture, :_destroy])
end
正如Cocoon READM所说的那样。 所以基本的想法是一个Item有几个Images,而这些Image又有这个paperclip字段picture。然后使用Coccon

呈现表单
#views/admin/items/new.html.erb
<div class="field">
  <div class="ui teal label">Imagen</div>
  <%= f.fields_for :images do |image| %>
    <%= render partial: 'image_fields', :f => image  %>
  <% end %>
</div>

#views/admin/items/_image_fields.html.erb
<div class="nested-fields">
  <%= f.file_field :image, :class => "add-image-field" %>
  <%= link_to_remove_association "Eliminar", f, :class => "ui red mini button" %>
</div>

在视图中一切似乎都运行正常,但随后查看发送到控制器的参数,出了点问题:

Parameters: {"utf8"=>"✓",
"authenticity_token"=>"AIogvRQuKNrAAOjM7YsnVQx7j2MwZ1VC3LiZy0cDDrU=", 
"item"=>{
  "name"=>"", 
  "description"=>"", 
  "price"=>"12345", 
  "images_attributes"=>{
    "1394577880921"=>{
      "image"=>#<ActionDispatch::Http::UploadedFile:0x00000003182718 @tempfile=#<Tempfile:/tmp/RackMultipart20140311-27326-19i0obp>, @original_filename="blue-diamond-rings.jpg", @content_type="image/jpeg", @headers="Content-Disposition: form-data; name=\"item[images_attributes][1394577880921][image]\"; filename=\"blue-diamond-rings.jpg\"\r\nContent-Type: image/jpeg\r\n">, "_destroy"=>"false"}}}, 
 "commit"=>"Crear"}

images_attributes之后的奇怪签名是什么?它破坏了项目保存过程。

感谢任何指针!

1 个答案:

答案 0 :(得分:3)

您调用file_field image,它应该是picture

其余的都很好。

什么是#34;怪异的&#34;在image_attributes内:

  • &#34; 1394577880921&#34;:临时ID,当项目保存到数据库时,将替换为真实ID。这是rails处理嵌套属性的方式。解析已发布的参数时,rails会将其转换为Image s。
  • 的数组
  • image(应该命名为picture)的值是文件数据,当然看起来很奇怪