Question

我正在使用rails4与paperclip和rails_admin宝石，我正在尝试建立一个链接，点击后会从提交表中下载所有附件。

这是我的代码

rails_admin/main/index.html.haml

- if @abstract_model.table_name == "submissions"
        = link_to "Download all", '/downloadAttachments'

submission_controller.rb

# Download zip file of all submission
  def download
    @submissions = Submission.all

    file = @submissions[0].file.url(:original, false) #folder to save the archive to

    Zip::ZipFile.open(file, create=nil) do |zipfile|
      @submissions.each do |filename|
       zipfile.add(filename.file_file_name, filename.file.url(:original, false))
      end
    end
  end

routes.rb

get '/downloadAttachments' => 'submissions#download'

当我点击链接时，我收到一条消息Cannot find submission with id downloadAll。根据我对rails的经验，应该调用该方法并为我创建可下载的zip。问题：这个def有什么问题，如何下载该zip文件？

[编辑]

此代码似乎有效，但它获得了：

File /files/submissions/files/45/original/file.pdf not found

但我可以确认该文件确实存在于我的公共文件夹中

Answer 1

这是解决方案：

# Download zip file of all submission def download @submissions = Submission.all archiveFolder = Rails.root.join('tmp/archive.zip') #Location to save the zip # Delte .zip folder if it's already there FileUtils.rm_rf(archiveFolder) # Open the zipfile Zip::ZipFile.open(archiveFolder, Zip::ZipFile::CREATE) do |zipfile| @submissions.each do |filename| zipfile.add(filename.file_file_name, 'public/files/submissions/files/' + filename.id.to_s + '/original/' + filename.file_file_name) end end # Send the archive as an attachment send_file(archiveFolder, :type => 'application/zip', :filename => '2016 Submissions.zip', :disposition => 'attachment') end

routes.rb

get '/downloadAttachments' => 'submissions#download'

= link_to "Download All", '/downloadAttachments'

在视图中：

ERROR! unexpected parameter type in action: <class 'ansible.parsing.yaml.objects.AnsibleSequence'>

The error appears to have been in '/root/myplaybook.yml': line 17, column 7, but may
be elsewhere in the file depending on the exact syntax problem.

The offending line appears to be:

# configure rsyslog
- name: configure rsyslog to expose events on port 42000
  ^ here

Answer 2

我认为你的link_to代码格式错误。第二个参数应该是路径/路径：

= link_to "Download all", {:controller => "/submissions", :action => "download"}

或

= link_to "Download all", download_submissions_path

下载模型RAILS中的所有附件

2 个答案: