ruby-on-rails - 销毁时不会删除回形针附件

Question

当模型被破坏时，使用 Paperclip (v4.2.0) 保存的附件不会从磁盘中删除，还有其他人遇到过这个问题吗？一切都按预期工作，但文件并未从磁盘中删除。任何帮助或想法将不胜感激!

楷模:

class Attachment < ActiveRecord::Base
  belongs_to :article

  has_attached_file :file, { :preserve_files => "false" }
  do_not_validate_attachment_file_type :file
end

class Article < ActiveRecord::Base
  belongs_to :topic
  belongs_to :subtopic
  belongs_to :author
  has_many :attachments, :dependent => :destroy
  accepts_nested_attributes_for :attachments, allow_destroy: true, reject_if: lambda { |a| a[:file].blank? }

  validates :topic_id, presence: true
  validates :title, presence: true, length: { maximum: 16 }
  validates :subtitle, length: { maximum: 20 }
  validates :content, presence: true
end

文章 Controller 中的销毁操作:

def destroy
  @article = Article.find(params[:id])
  begin
    # first delete the attachments from disk
    @article.attachments.each do |a|
      a.file.destroy
    end
    @article.destroy
  rescue
    flash[:danger] = "Unable to delete article"
  else
    flash[:success] = "Article deleted"
  end
  redirect_to admin_articles_url
end

Answer 1

您需要在销毁附件之前将其"file"属性设置为 nil，以便从磁盘中删除上传的文件。

所以你的代码应该是这样的

文章 Controller 中的销毁操作:

def destroy
  @article = Article.find(params[:id])
  begin
    # first delete the attachments from disk
    @article.attachments.each do |a|
     a.file = nil
     a.save
    end
    @article.destroy
  rescue
    flash[:danger] = "Unable to delete article"
  else
    flash[:success] = "Article deleted"
  end
  redirect_to admin_articles_url
 end