Mailer generation and templates in Ruby on Rails - Cheat Sheet & Quick Revision

Recall & Review

beginner

What command do you use to generate a new mailer in Rails?

You use rails generate mailer MailerName to create a new mailer with default files.

beginner

Where do Rails mailer templates live?

Mailer templates are stored in app/views/mailer_name/ folder, with one file per email action.

intermediate

How do you define an email method inside a Rails mailer?

Inside the mailer class, define a method that sets instance variables and calls mail(to:, subject:) to send the email.

beginner

What file extension do Rails mailer templates use for HTML emails?

Rails uses .html.erb files for HTML email templates, combining HTML with embedded Ruby.

intermediate

How can you preview emails in Rails during development?

You can preview emails by creating a preview class in <code>test/mailers/previews</code> and visiting <code>http://localhost:3000/rails/mailers</code>.

Which command generates a mailer named 'UserMailer' in Rails?

A rails generate mailer UserMailer

B rails generate model UserMailer

C rails generate controller UserMailer

D rails generate job UserMailer

The correct command to generate a mailer is rails generate mailer UserMailer.

Where do you place the email template files for a mailer called 'NotificationMailer'?

A app/controllers/notification_mailer/

B app/mailers/notification_mailer/

C app/views/notification_mailer/

D app/assets/notification_mailer/

Email templates go inside app/views/notification_mailer/ folder.

What method do you call inside a mailer method to send an email?

A send_email()

B mail()

C deliver_now()

D email_send()

Inside a mailer method, you call mail(to:, subject:) to prepare the email.

Which file extension is used for plain text email templates in Rails?

A .text.plain

B .text.erb

C .html.erb

D .txt.erb

Plain text email templates use .txt.erb extension.

How can you preview emails in Rails without sending them?

A By visiting <code>/rails/mailers</code> in the browser during development

B Using <code>rails mailer preview</code> command

C Emails cannot be previewed without sending

D Using <code>rails email preview</code> gem only

You can preview emails by visiting http://localhost:3000/rails/mailers in development.

Explain the steps to create and send an email using a Rails mailer.

Think about generating, coding the method, templates, and sending.

Describe how Rails mailer templates work and where they are stored.

Focus on folder location, file types, and how templates use Ruby.