载波不会从内存中删除文件

Question

我有两个模型User和Attachment其中User has many Attachments和Attachment belongs to User

我正在尝试使用Carrierwave实现文件上传/下载服务。

这是我保存上传的方式：

def create
    uploader = LauncherUploader.new
    @user = User.find(params[:user_id])
    @attachment = Attachment.new(params[:attachment => {:file => [ :original_filename ]}])
    @attachment.name = params[:attachment][:file].original_filename
    @attachment.format = params[:attachment][:file].content_type
    @attachment.user_id = @user.id
    @attachment.save
    uploader.store!(params[:attachment][:file])
    redirect_to user_attachments_path, notice: "The file #{@attachment.name} was uploaded"
  end

这就是我试图删除文件的方式：

def destroy
    @user = User.find(params[:user_id]) or not_found
    @attachment = @user.attachments.find(params[:id])
    @attachment.destroy
    uploader = LauncherUploader.new
    uploader.remove_attachment!(@attachment)
    redirect_to user_attachments_path, notice:  "The file #{@attachment.name} has been deleted."
  end

我的上传者被称为Launcher。当前destroy方法从数据库中删除记录，但不从内存中删除记录。需要做些什么来纠正这种行为？

修改

这是当前附件的显示方式

[VIEW]

<% @attachments.each do |attachment| %>
  <tr>
    <td><%= attachment.name %></td>
    <td><%= attachment.format %></td>
    <td><%= link_to 'Download Link', :action => 'download' , :id => attachment.id  %></td>
    <td><%= button_to 'Delete', user_attachment_path(params[:user_id], attachment),
            method: :delete,
            data: { confirm: 'Are you sure?' }, :class => 'btn' %></td>
  </tr>
  <% end %>

[CONTROLLER]

def index
    @attachments = Attachment.where(:user_id => params[:user_id])
  end

任何已删除的文件都不会出现在此列表中。但继续存在于上传文件夹中。