我似乎找不到在所有组件中都完整的示例。我很难删除图片附件
课程
class Product has_many :product_images, :dependent => :destroy accepts_nested_attributes_for :product_images end class ProductImage belongs_to :product has_attached_file :image #(etc) end
看法
<%= semantic_form_for [:admin, @product], :html => {:multipart => true} do |f| %> <%= f.inputs "Images" do %> <%= f.semantic_fields_for :product_images do |product_image| %> <% unless product_image.object.new_record? %> <%= product_image.input :_destroy, :as => :boolean, :label => image_tag(product_image.object.image.url(:thumb)) %> <% else %> <%= product_image.input :image, :as => :file, :name => "Add Image" %> <% end %> <% end %> <% end %> <% end %>
控制器
class Admin::ProductsController < AdminsController def edit @product = Product.find_by_permalink(params[:id]) 3.times {@product.product_images.build} # added this to create add slots end def update @product = Product.find_by_permalink(params[:id]) if @product.update_attributes(params[:product]) flash[:notice] = "Successfully updated product." redirect_to [:admin, @product] else flash[:error] = @product.errors.full_messages render :action => 'edit' end end end
看起来不错,但是当我选中复选框时,实际上什么也没发生。在请求中我看到:
"product"=>{"manufacturer_id"=>"2", "size"=>"", "cost"=>"5995.0",
"product_images_attributes"=>{"0"=>{"id"=>"2", "_destroy"=>"1"}}
但是没有更新,产品图像也没有保存。
我是否遗漏了有关“accepts_nested_attributes_for”如何工作的基本知识?