载波文件删除(Carrierwave file delete)

我再次需要你的帮助。现在我需要了解如何使用Carrierwave上传的文件进行删除（在我的情况下 - 图像）。

models / attachment.rb：

class Attachment < ActiveRecord::Base belongs_to :attachable, :polymorphic => true attr_accessible :file, :file mount_uploader :file, FileUploader end

models / post.rb：

class Post < ActiveRecord::Base attr_accessible :content, :title, :attachments_attributes, :_destroy has_many :attachments, :as => :attachable accepts_nested_attributes_for :attachments end

* views / posts / _form.html.erb：*

<%= nested_form_for @post, :html=>{:multipart => true } do |f| %> <% if @post.errors.any? %> <div id="error_explanation"> <h2><%= pluralize(@post.errors.count, "error") %> prohibited this post from being saved:</h2> <ul> <% @post.errors.full_messages.each do |msg| %> <li><%= msg %></li> <% end %> </ul> </div> <% end %> <div id="field"> <%= f.label :Nosaukums %>:<br /><br /> <%= f.text_field :title %><br /><br /> </div> <div id="field"> <%= f.label :Raksts %>:<br /><br /> <%= f.text_area :content %><br /><br /> </div> <%= f.fields_for :attachments do |attachment| %> <% if attachment.object.new_record? %> <%= attachment.file_field :file %> <% else %> <%= image_tag(attachment.object.file.url) %> <%= f.check_box :_destroy %> <% end %> <% end %> <%= f.submit "Publicēt", :id => "button-link" %> <% end %>

当我试图删除以前上传的文件时，我有这个错误：

unknown attribute: _destroy

也许有问题，因为我有多个文件上传不仅一个。

Again I need your help. Now I need to understand how I can delete with Carrierwave uploaded files (in my case - images).

models/attachment.rb :

class Attachment < ActiveRecord::Base belongs_to :attachable, :polymorphic => true attr_accessible :file, :file mount_uploader :file, FileUploader end

models/post.rb :

class Post < ActiveRecord::Base attr_accessible :content, :title, :attachments_attributes, :_destroy has_many :attachments, :as => :attachable accepts_nested_attributes_for :attachments end

*views/posts/_form.html.erb :*

<%= nested_form_for @post, :html=>{:multipart => true } do |f| %> <% if @post.errors.any? %> <div id="error_explanation"> <h2><%= pluralize(@post.errors.count, "error") %> prohibited this post from being saved:</h2> <ul> <% @post.errors.full_messages.each do |msg| %> <li><%= msg %></li> <% end %> </ul> </div> <% end %> <div id="field"> <%= f.label :Nosaukums %>:<br /><br /> <%= f.text_field :title %><br /><br /> </div> <div id="field"> <%= f.label :Raksts %>:<br /><br /> <%= f.text_area :content %><br /><br /> </div> <%= f.fields_for :attachments do |attachment| %> <% if attachment.object.new_record? %> <%= attachment.file_field :file %> <% else %> <%= image_tag(attachment.object.file.url) %> <%= f.check_box :_destroy %> <% end %> <% end %> <%= f.submit "Publicēt", :id => "button-link" %> <% end %>

When I am trying to delete previous uploaded file I have this error:

unknown attribute: _destroy

Maybe there is problem because I have multiple file uploads not only one.