我使用基于此应用程序的回形针进行了多次上传 https://github.com/websymphony/Rails3-Paperclip-Uploadify并且它工作正常,但现在我需要构建一个表单,用户可以删除部分上传内容。
我有这个表单来删除一个产品的上传
<%= form_for @product, :html => { :method => :put }, :html => { :multipart => true } do |f| %>
<h3 id="photos_count"><%= pluralize(@product.uploads.size, "Photo")%></h3>
<%= f.fields_for :uploads do |photo_fields| %>
<% if !photo_fields.object.nil? and !photo_fields.object.new_record? %>
<%= image_tag(photo_fields.object.photo.url(:thumb)) %>
<p><%= photo_fields.check_box :_destroy, :class=>'checkbox' %> Delete item</p>
<% end %>
<% end %>
<% end %>
这个表单以某种方式显示正确的上传号码,我可以在终端窗口中看到所有上传产品都带有product_id = product.id,但是我没有在页面中显示的图像,如图所示:
终端
Started GET "/admin/products/40" for 127.0.0.1 at Tue Apr 10 10:20:06 +0300 2012
Processing by Admin::ProductsController#show as HTML
Parameters: {"id"=>"40"}
Creating scope :page. Overwriting existing method AdminUser.page.
AdminUser Load (2.4ms) SELECT `admin_users`.* FROM `admin_users` WHERE `admin_users`.`id` = 5 LIMIT 1
Creating scope :page. Overwriting existing method Product.page.
Product Load (0.5ms) SELECT `products`.* FROM `products` WHERE `products`.`id` = 40 LIMIT 1
Creating scope :page. Overwriting existing method Upload.page.
Upload Load (0.4ms) SELECT `uploads`.* FROM `uploads` WHERE `uploads`.`product_id` = 40 AND (file_avatar = 1) LIMIT 1
Creating scope :page. Overwriting existing method Category.page.
Category Load (0.4ms) SELECT `categories`.* FROM `categories` WHERE `categories`.`id` = 2 LIMIT 1
(0.6ms) SELECT COUNT(*) FROM `uploads` WHERE `uploads`.`product_id` = 40
Rendered admin/products/_delete_photos.html.erb (154.3ms)
CACHE (0.0ms) SELECT COUNT(*) FROM `uploads` WHERE `uploads`.`product_id` = 40
其他信息:
upload.rb
class Upload < ActiveRecord::Base
attr_accessible :product_id, :photo
belongs_to :product
has_attached_file :photo, :styles => { :medium => "300x300>", :thumb => "100x100>" }
attr_accessible :created_at, :photo_file_size, :photo_file_name, :updated_at, :photo_content_type,
:file_avatar, :photo_updated_at, :uploads_attributes, :photo_attributes
end
product.rb
class Product < ActiveRecord::Base
has_many :uploads, :dependent => :destroy
accepts_nested_attributes_for :uploads, :allow_destroy => true
end
uploads_controller.rb
# GET /uploads/1/edit
def edit
@upload = Upload.find(params[:id])
end
# POST /uploads
# POST /uploads.xml
# PUT /uploads/1
# PUT /uploads/1.xml
def update
@upload = Upload.find(params[:id])
respond_to do |format|
if @upload.update_attributes(params[:upload])
format.html { redirect_to(@upload, :notice => 'Upload was successfully updated.') }
format.xml { head :ok }
else
format.html { render :action => "edit" }
format.xml { render :xml => @upload.errors, :status => :unprocessable_entity }
end
end
end
# DELETE /uploads/1
# DELETE /uploads/1.xml
def destroy
@upload = Upload.find(params[:id])
@upload.destroy
respond_to do |format|
format.html { redirect_to(products_url) }
format.xml { head :ok }
end
end
所以这里的问题是:为什么图像不会显示旁边的复选框。谢谢。
更新
Processing by ProductsController#update as HTML
Parameters: {"commit"=>"Delete sellected photos", "authenticity_token"=>"af5+YybkZ1KMu/DmZmlui9frqQX5ka8v/vvv0hi9PVo=", "id"=>"42", "product"=>{"uploads_attributes"=>{"7"=>{"id"=>"322", "_destroy"=>"1"}, "6"=>{"id"=>"321", "_destroy"=>"0"}, "5"=>{"id"=>"320", "_destroy"=>"0"}, "4"=>{"id"=>"319", "_destroy"=>"0"}, "3"=>{"id"=>"318", "_destroy"=>"0"}, "2"=>{"id"=>"317", "_destroy"=>"0"}, "1"=>{"id"=>"316", "_destroy"=>"0"}, "0"=>{"id"=>"315", "_destroy"=>"0"}}}, "utf8"=>"✓"}
在Jesse的回复之后我现在有了我的页面中的图像,带有复选框,但是在检查了一些图片并按下提交按钮后,照片不会被删除
products_controller
def更新 @product = Product.find(params [:id])
respond_to do |format|
if @product.update_attributes(params[:product])
format.html { redirect_to(@product, :notice => 'Product was successfully updated.') }
format.xml { head :ok }
else
format.html { render :action => "edit" }
format.xml { render :xml => @product.errors, :status => :unprocessable_entity }
end
end
端
答案 0 :(得分:1)
您正在尝试使用nested_attributes,但尚未在产品型号上启用
class Product < ActiveRecord::Base
has_many :uploads, dependent: :destroy, autosave: true
accepts_nested_attributes_for :uploads, allow_destroy: true, reject_if: :all_blank
end
更多:http://apidock.com/rails/ActiveRecord/NestedAttributes/ClassMethods/accepts_nested_attributes_for