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Sending Emails In Rails Applications

ruby rails rubygems    about 4 years Ago     7318   156   Like


In this article we will walk through a simple app to demonstrate how to send emails through a Rails application with ActionMailer, ActionMailer Preview, and through a third party email service provider such as Gmail or Mailgun. We will also demostrate how to use Active Job to send the email with a background processor.

You can find the code for this tutorial here

Sending Emails Using ActionMailer and Gmail

Now we will build a rails application which will send an email to the user when a new user is created. Let’s create a new rails application.

$ rails new new_app_name
$ rails g scaffold user name:string email:string
$ rake db:migrate

We now have a basic application, let’s make use of ActionMailer. The mailer generator is similar to any other generator in rails.

$ rails g mailer example_mailer
create  app/mailers/example_mailer.rb
invoke  erb
create    app/views/example_mailer
invoke  test_unit
create    test/mailers/example_mailer_test.rb
create    test/mailers/previews/example_mailer_preview.rb

Our application is currently using Rails 4.2.0.beta4 so the rails generator has created preview files for our application by default as test/mailers/previews/example_mailer_preview.rb which we will be using later.


class ExampleMailer < ActionMailer::Base
  default from: "from@example.com"

Now let’s write methods and customized email. First you should change the default email address from from@example.com to the email address you want use as the sender’s address.

class ExampleMailer < ActionMailer::Base
  default from: "from@example.com"

  def sample_email(user)
    @user = user
    mail(to: @user.email, subject: 'Sample Email') end end

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