文件下载链接在rails [英] file download link in rails

问题描述

我想给访问者下载一​​些pdf的选项。
我试过：

  <％= link_toabc，/data/abc.pdf\"% > 
 
<％= link_toabc，/data/abc.pdf，：format => 'pdf'％> 
  

和一些变体，但似乎不起作用。我继续获得没有路线匹配[GET]/data/abc.pdf

我有pdf文件在名为data的文件夹中，位于资产文件夹中。
任何帮助将不胜感激。

解决方案

Rails 4：

路线：

  gethome / download_pdf
  def download_pdf 
 send_file（
＃{Rails.root} /public/your_file.pdf，
 filename：your_custom_file_name.pdf，
 type：应用程序/ pdf
）
 end 
  

在控制器中（需要生成pdf ）：

  requireprawn
 class ClientsController< ApplicationController 
 
 def download_pdf 
 client = Client.find（params [：id]）
 send_data generate_pdf（client），
 filename：＃{client.name} .pdf，
类型：application / pdf
 end 
 
 private 
 
 def generate_pdf（client）
 Prawn :: Document $ new 
 text client.name，align：：center 
 textAddress：＃{client.address}
 textEmail：＃{client.email}
 end.render 
 end 
 end 
  

在视图中：

 <％= link_to'下载PDF'，home_download_pdf_url％> 
  

Rails 3

执行方式：

  def下载
 send_data pdf，
：filename => ; abc.pdf，
：type => application / pdf
 end 
  

你应该去这个替代

Rails< 3

公开文件夹中的文件

回答：如何从rails应用程序下载文件

您应该将文件放在公用文件夹中，这就是诀窍。

如果文件放置正确，应该工作。

如果您无法将文件移动到公用文件夹，请告知我。

通过控制器下载

创建一个带有downlaod操作的控制器， link_to 它

  def下载
 send_file'/assets/data/abc.pdf'，：type => ;application / pdf，x_sendfile => true 
 end 
  

I would like to give visitors the option to download some pdf. I have tried:

<%= link_to "abc", "/data/abc.pdf"%>

<%= link_to "abc", "/data/abc.pdf", :format => 'pdf' %>

and some variations but they don't seem to work. I keep getting No route matches [GET] "/data/abc.pdf"

I have the pdf files in a folder called data, located in the assets folder. Any help would be appreciated.

解决方案

Rails 4:

in routes:

get "home/download_pdf"

in controller (already have pdf):

def download_pdf
  send_file(
    "#{Rails.root}/public/your_file.pdf",
    filename: "your_custom_file_name.pdf",
    type: "application/pdf"
  )
end

in controller (need to generate pdf):

require "prawn"
class ClientsController < ApplicationController

  def download_pdf
    client = Client.find(params[:id])
    send_data generate_pdf(client),
              filename: "#{client.name}.pdf",
              type: "application/pdf"
  end

  private

  def generate_pdf(client)
    Prawn::Document.new do
      text client.name, align: :center
      text "Address: #{client.address}"
      text "Email: #{client.email}"
    end.render
  end
end

in view:

<%= link_to 'Download PDF', home_download_pdf_url %>

Rails 3

The way to do it:

def download
  send_data pdf,
    :filename => "abc.pdf",
    :type => "application/pdf"
end

You should go to this alternative

Rails < 3

File in public folder

This may the the answer to you: How to download a file from rails application

You should place your file in public folder, that is the trick.

Should work when the file is placed correctly.

Let me know if you can't move your file to public folder.

Download via controller

Create a controller with a downlaod action and link_to it

  def download
    send_file '/assets/data/abc.pdf', :type=>"application/pdf", :x_sendfile=>true
  end

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