How to construct links to static images?

Question

I realized that when I send mails(letters) on localhost site via local postfix server, they were sent successfully, but each time I need to include the letter link to my logo stored in:

public/castle.jpg

app/mailers/review_mailer.rb:

class ReviewMailer < ApplicationMailer
  default from: 'no-reply@kalinin.ru'

  def welcome_email(review)
    @review = review
    mail(to: 'bla@bla.ru', subject: 'New review create')
  end  
end

views/review_mailer/welcome_email.html.erb:

<!DOCTYPE html>
<html>
  ...........................
    <p>logo: <%= image_tag 'public/castle.jpg' %></p>
  </body>
</html>

application.rb:

config.action_mailer.default_url_options = { host: 'localhost' }

development.rb:

  config.action_mailer.raise_delivery_errors = false
  config.action_mailer.delivery_method = :sendmail
  config.action_mailer.default_url_options = { :host => 'localhost:3000' }

reviews_controller:

  def create
    @review = current_user.reviews.build(review_params)
    if @review.save
      ReviewMailer.welcome_email(@review).deliver_now
      redirect_to root_path
  end

after creating a new review, here is the console output:

ReviewMailer#welcome_email: processed outbound mail in 205.9ms

Sent mail to bla@bla.ru (73.5ms)
Date: Tue, 22 Sep 2015 12:47:11 +0300
From: no-reply@kalinin.ru
To: prozaik81-2@yandex.ru
Message-ID: <5601239fdd0d3_18b43f823a7394382836b@kalinin.mail>
Subject: New review create
Mime-Version: 1.0
Content-Type: multipart/alternative;
 boundary="--==_mimepart_5601239fdbc22_18b43f823a73943828272";
 charset=UTF-8
Content-Transfer-Encoding: 7bit

----==_mimepart_5601239fdbc22_18b43f823a73943828272
Content-Type: text/html;
 charset=UTF-8
Content-Transfer-Encoding: 7bit

<html>
  <body>
    <!DOCTYPE html>
<html>
....................
    <p>logo: <img src="/images/public/castle.jpg" alt="Castle" /></p>
  </body>
</html>
  </body>
</html>

----==_mimepart_5601239fdbc22_18b43f823a73943828272--

Redirected to http://localhost:3000/
Completed 302 Found in 601ms (ActiveRecord: 301.4ms)

Mail(letter) is not being sent, what can possibly be wrong?

score 1 · Answer 1 · answered Sep 22 '15 at 10:13

I think you should write this in your environment file:

config.action_mailer.asset_host = "http://localhost:3000"

or

config.asset_host = 'http://localhost:3000'

This will implicity set next configs:

config.action_controller.asset_host = 'http://localhost:3000'
config.action_mailer.asset_host = 'http://localhost:3000'

score 1 · Answer 2 · answered Sep 22 '15 at 10:23

You don't need to refer to public in your paths. You should be able to reference castle.jpg directly...

<%= image_tag 'castle.jpg' %>

You have to remember that a Rails app runs from the public directory. Indeed, if you set up an nginx server, it actually recommends pointing to public:

server {
        listen 80 default_server;
        listen [::]:80 default_server ipv6only=on;

        server_name mydomain.com;
        passenger_enabled on;
        rails_env    production;
        root         /home/deploy/myapp/current/public;

Thus, if you're referencing public, you get a sort-of "inception" type effect where the app is trying to reference itself.

--

In regards the asset host for the mailout, the other answers will be able to help. I've not got the most experience in this area.

How to construct links to static images?

2 Answers2