file download link in rails

Question

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.

Answer 1

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