ActionMailer 3 without Rails

Question

I\'m writing a small Ruby program that will pull records from a database and send an HTML email daily. I\'m attempting to use ActionMailer 3.0.3 for this, but I\'m running i

Answer 1

After some serious debugging, I found how to configure it.

file mailer.rb

require 'action_mailer'

ActionMailer::Base.raise_delivery_errors = true
ActionMailer::Base.delivery_method = :smtp
ActionMailer::Base.smtp_settings = {
   :address   => "smtp.gmail.com",
   :port      => 587,
   :domain    => "domain.com.ar",
   :authentication => :plain,
   :user_name      => "test@domain.com.ar",
   :password       => "passw0rd",
   :enable_starttls_auto => true
  }
ActionMailer::Base.view_paths= File.dirname(__FILE__)

class Mailer < ActionMailer::Base

  def daily_email
    @var = "var"

    mail(   :to      => "myemail@gmail.com",
            :from    => "test@domain.com.ar",
            :subject => "testing mail") do |format|
                format.text
                format.html
    end
  end
end

email = Mailer.daily_email
puts email
email.deliver

file mailer/daily_email.html.erb

<p>this is an html email</p>
<p> and this is a variable <%= @var %> </p>

file mailer/daily_email.text.erb

this is a text email

and this is a variable <%= @var %>

Nice question! It helped me to understand a bit more how Rails 3 works :)

Answer 2

It took me a while to get this to work in (non-)Rails 4. I suspect it's just because I have ':require => false' all over my Gemfile, but I needed to add the following to make it work:

require 'action_view/record_identifier'
require 'action_view/helpers'
require 'action_mailer'

Without the above code, I kept getting a NoMethodError with undefined method 'assign_controller'.

After that, I configured ActionMailer as follows:

ActionMailer::Base.smtp_settings = {
  address: 'localhost', port: '25', authentication: :plain
}
ActionMailer::Base.default from: 'noreply@example.com'
ActionMailer::Base.raise_delivery_errors = true
ActionMailer::Base.logger = Logger.new(STDOUT)
ActionMailer::Base.logger.level = Logger::DEBUG
ActionMailer::Base.view_paths = [
  File.join(File.expand_path("../../", __FILE__), 'views', 'mailers')
  # Note that this is an Array
]

The templates go in lib/<GEM_NAME>/views/mailers/<MAILER_CLASS_NAME>/<MAILER_ACTION_NAME>.erb (MAILER_ACTION_NAME is the public instance method of your mailer class that you call to send the email).

Lastly, don't forget to put this in your spec_helper:

ActionMailer::Base.delivery_method = :test