Ruby on Rails Ruby on Rails Action Mailer, Background Jobs & Caching

Question 1

What class does ApplicationMailer inherit from in Ruby on Rails?

Accepted Answer

ActionMailer::Base

Answer

ApplicationMailer inherits from ActionMailer::Base, which provides all email sending functionality including delivery methods, attachments, and header defaults.

Question 2

Which method delivers an email synchronously (immediately) in Action Mailer?

Accepted Answer

deliver_now

Answer

deliver_now sends the email synchronously, blocking the current thread until delivery is complete.

Question 3

Where should Action Mailer view templates be stored in a Rails application?

Accepted Answer

app/views/mailer_name/

Answer

Mailer views follow Rails convention and are stored in app/views/ under a folder named after the mailer class (e.g., app/views/user_mailer/).

Question 4

How do you set a default 'from' email address for all mailers in ApplicationMailer?

Accepted Answer

default from: 'noreply@app.com'

Answer

The default class method inside ApplicationMailer accepts a hash of header defaults, including from, reply_to, and other email headers.

Question 5

Which delivery method is configured for Action Mailer in the Rails test environment?

Accepted Answer

:test

Answer

The :test delivery method stores emails in ActionMailer::Base.deliveries array instead of sending them, making it easy to assert email content in tests.

Ruby on Rails Practice Test

Ruby on Rails Practice Test

Ruby on Rails Ruby on Rails Action Mailer, Background Jobs & Caching