Ruby on Rails send_file，控制器操作中的代码运行两次

Question

我在用户可下载文件方面遇到了一个奇怪的问题，文件正在正确下载，但控制器操作中的其他代码正在执行两次。我正在使用 CarrierWave，它安装在 .file 的 Document 模型上。

我希望用户能够点击此链接下载文件：

<%= link_to document.file.file.filename, document_path(document)  %>

这是我的控制器的样子：

  def show
    document = Document.find(params[:id])

    # Track this download
    CourseDownload.create(course: document.course, user: current_user)   

    # Download the file
    send_file 'public' + document.file.url.to_s
  end

当我单击链接时，文件下载，但创建了 2 个 CourseDownload 记录。在日志中，GET 请求似乎发生了两次：

Started GET "/documents/1" for 127.0.0.1 at 2014-04-17 18:12:47 -0400
Processing by DocumentsController#show as HTML
  Parameters: {"id"=>"1"}
  Document Load (0.2ms)  SELECT "documents".* FROM "documents" WHERE "documents"."id" = ? LIMIT 1  [["id", "1"]]
  User Load (0.2ms)  SELECT "users".* FROM "users" WHERE "users"."remember_token" = 'xxx' LIMIT 1
  CACHE (0.0ms)  SELECT "documents".* FROM "documents" WHERE "documents"."id" = ? LIMIT 1  [["id", "1"]]
public/uploads/document/file/1/bootstrap-3.0.0.zip
Sent file public/uploads/document/file/1/bootstrap-3.0.0.zip (0.1ms)
Completed 200 OK in 7ms (ActiveRecord: 0.4ms)


Started GET "/documents/1" for 127.0.0.1 at 2014-04-17 18:12:47 -0400
Processing by DocumentsController#show as HTML
  Parameters: {"id"=>"1"}
  Document Load (0.2ms)  SELECT "documents".* FROM "documents" WHERE "documents"."id" = ? LIMIT 1  [["id", "1"]]
  User Load (0.1ms)  SELECT "users".* FROM "users" WHERE "users"."remember_token" = 'xxx' LIMIT 1
  CACHE (0.0ms)  SELECT "documents".* FROM "documents" WHERE "documents"."id" = ? LIMIT 1  [["id", "1"]]
public/uploads/document/file/1/bootstrap-3.0.0.zip
Sent file public/uploads/document/file/1/bootstrap-3.0.0.zip (0.1ms)
Completed 200 OK in 5ms (ActiveRecord: 0.3ms)

知道我做错了什么吗？

谢谢！

Answer 1

问题最终是由turbolinks 问题引起的。

解决方法：

<%= link_to document.file.file.filename, document_path(document), 'data-no-turbolink' => true %>