在Rails控制器中send

在Rails控制器中send_file之后发生了什么？(What happend after send_file in Rails controller?)

在index视图中，有一个下载文件的链接：

<%= link_to filename, listing_download_path(:file => filename) %>

在控制器中：

def download pathname = File.join(USER_FOLDER, params[:file]) if File.file?(pathname) send_file pathname end end end

当用户单击下载时，将显示文件下载弹出窗口。 文件下载后会发生什么？ 铁轨只是坐在那里再做什么？ 如果我删除send_file行，将呈现dwonload.html.erb 。 send_file是否跳过视图呈现？

如果我想要显示“你已下载...”这样的内容怎么办？

In the index view, there is a link to download file:

<%= link_to filename, listing_download_path(:file => filename) %>

In the controller:

def download pathname = File.join(USER_FOLDER, params[:file]) if File.file?(pathname) send_file pathname end end end

When the user click download, a file download popup is shown. What's happen after the file is downloaded? Does rails just sit there and do nothing more? If I delete the send_file line, dwonload.html.erb will be rendered. Does send_file skip view rendering?

What if I want to show soemthing like "You have downloaded ..."?

最满意答案

send_file是一个渲染本身。 您可以使用此问题中提出的方法：

Rails：send_file永远不会呈现页面或DoubleRender错误

基本上，您的下载链接将发送到“成功”视图，您可以从中自动调用下载文件方法。

The send_file is a render itself. You could use the approach proposed in this question:

Rails: send_file never renders page or DoubleRender error

Basically your download link will send to a "success" view, from which you call the download file method automatically.