Rails从show action下载文件吗？ [英] Rails download file from show action?

问题描述

我有一个允许您上传文档的上传器。我要做的是在查看文档的显示操作时触发该文档的下载。网址类似于：

I have an uploader which allows you to upload documents. What I want to do is trigger a download for the document when you view its show action. The url would be something like:

/documents/16

此文档可以是.txt或.doc。

This document could be .txt, or .doc.

到目前为止，我的表演动作如下：

So far, my show action looks like this:

  def show
    @document = Document.find(params[:id])
    respond_with(@document) do |format|
      format.html do
        render layout: false, text: @document.name
      end
    end
  end

我将如何实现这一目标？

How would I go about achieving this?

推荐答案

看看 send_data 方法：

将给定的二进制数据发送到浏览器。此方法类似于render：text => data，但是还允许您指定浏览器是将响应显示为文件附件（即在下载对话框中）还是内联数据。您还可以设置内容类型，外观文件名以及其他内容。

Sends the given binary data to the browser. This method is similar to render :text => data, but also allows you to specify whether the browser should display the response as a file attachment (i.e. in a download dialog) or as inline data. You may also set the content type, the apparent file name, and other things.

因此，我认为您的情况应该是像这样的东西：

So, I think in your case it should be something like this:

def show
  @document = Document.find(params[:id])
  send_data @document.file.read, filename: @document.name
end

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