Rails：send_file不会呈现页面或DoubleRender错误 [英] Rails: send_file never renders page or DoubleRender error

问题描述

所以我试图在PayPal购买后触发下载。所以我做的第一个方法就是将任何错误重定向到一个错误页面。除了结果页面之外的所有工作都不会在罚款发送后呈现。如果我试图明确地呈现页面，我得到了DoubleRender错误。

所以我迷失在正确的事情上：

我有一个名为getapk.erb的页面，并在其控制器中有getfile代码。如果我遇到一个错误，我redirect_to pperror.erb

所以我不重定向到错误页面，但如果在页面上？

解决方案

当你发送一个send_file的时候，所以显示'成功'页面和发送文件是两个单独的呈现。

我会让成功页面和文件下载两个单独的控制器操作，并显示一个链接

例如

  def成功
＃显示带有文件下载链接的html页面
结束
 $ b $ def file_download 
 send_file #make确定你有：inline => false 
 end 
  

然后你可以使用javascript来显示它们在同样的时间。

在success.erb的底部放置这样的事情，在成功页面呈现时自动调出下载对话框。

 < script language =JavaScript> 
 
 window.location =<％= url_for：action =>file_download，：id => 'etc'％>; 
 
< / script> 
  

So I'm trying to trigger a download after a PayPal purchase. So the first way I did was on any error to redirect to an error page. This all works other than the results page never gets rendered after the fine is send. If I try to explicitly to render the page I get the DoubleRender error.

So I'm lost on what the correct things to do is:

I have a page called getapk.erb and have the getfile code in it's controller. If I encounter an error I redirect_to pperror.erb

So I not redirect to an error page, but an if on the page?

解决方案

When you 'send_file' that is a render in it's self. So displaying a 'success' page and sending a file is two separate renders.

I would make the success page and file download two separate controller actions, and display a link to the file download on the success page.

e.g.

def success
 #show html page with file download link
end

def file_download
 send_file #make sure you have :inline => false
end

Then you could use javascript to make it appear they are rendering both at the same time.

At the bottom of your success.erb put somthing like this to bring up the download dialog box automatically on render of the success page.

<script language="JavaScript">

    window.location=<%=url_for :action=>"file_download", :id => 'etc' %>;

</script>

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