如何通过carrierwave删除nested_form中的资产

Question

您好。有人在Carrierwave中工作删除嵌套形式资产的解决方案吗？

模型

has_many :article_images, :dependent => :destroy    
accepts_nested_attributes_for :article_images
mount_uploader :image, ImageUploader    
belongs_to :article, :polymorphic => true

schema.rb

create_table "article_images", :force => true do |t|
t.string "image"
t.string "article_id"
end
create_table "articles", :force => true do |t|
t.string "title"
end

控制器

def edit
@article = Article.find(params[:id])
@article.article_images.build
end

视图

_form.html.erb
<%= f.fields_for :article_images do |article_image| %>
<% if article_image.object.new_record? %>
<%= article_image.file_field :image %>
<% else %>
<%= image_tag(article_image.object.image.url(:thumb)) %>
<%= article_image.check_box :remove_image %> #DON'T WORK
<% end %>
<% end %>

Answer 1

我认为这样做会更好：

class ArticleImage < ActiveRecord::Base
  # ...
  attr_accessible :remove_image
  after_save :clean_remove_image
  def changed?
    !!(super || remove_image)
  end
  def clean_remove_image
    self.remove_image = nil
  end
end

它对我有效。

Answer 2

如果将其添加到模型中的accepts_nested_attributes_for中会发生什么：

accepts_nested_attributes_for :article_images, :allow_destroy => true

并在您的视图中更改此代码：

<%= article_image.check_box :remove_image %> #DON'T WORK

对此：

<%= article_image.check_box :_destroy %> #MIGHT WORK?