Mailer generation and templates in Ruby on Rails - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to generate a new mailer named UserMailer.

Ruby on Rails

rails generate [1] UserMailer

Drag options to blanks, or click blank then click option'

Amodel

Bcontroller

Cmailer

Dscaffold

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'model' instead of 'mailer' will create a database model, not a mailer.

Using 'controller' creates a controller, not a mailer.

In Rails, to create a mailer, you use rails generate mailer followed by the mailer name.

2fill in blank

medium

Complete the mailer method definition to send a welcome email to a user.

Ruby on Rails

def welcome_email(user)
  @user = user
  mail(to: @user.email, subject: [1])
end

Drag options to blanks, or click blank then click option'

A:greeting

B:welcome

C"Hello"

D"Welcome to our site!"

Attempts:

3 left

💡 Hint

Common Mistakes

Using a symbol instead of a string for the subject.

Forgetting quotes around the subject text.

The subject option in the mail method expects a string for the email subject line.

3fill in blank

hard

Fix the error in the mailer view file to correctly display the user's name in the email.

Ruby on Rails

<p>Hello, [1]!</p>

Drag options to blanks, or click blank then click option'

A<% @user.name %>

B<%= @user.name %>

C{{ @user.name }}

D<%= user.name %>

Attempts:

3 left

💡 Hint

Common Mistakes

Using <% %> without equals sign does not output content.

Using wrong variable name without @.

In Rails mailer views, use <%= %> to output Ruby code. The instance variable @user holds the user object.

4fill in blank

hard

Fill both blanks to set the default sender email and layout in the mailer class.

Ruby on Rails

class UserMailer < ApplicationMailer
  [1] '[e-mail]'
  [2] 'mailer'
end

Drag options to blanks, or click blank then click option'

Adefault from:

Blayout

Cdefault sender:

Dtemplate

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'default sender:' instead of 'default from:'.

Using 'template' instead of 'layout' for layout setting.

Use default from: to set the sender email and layout to specify the mailer layout.

5fill in blank

hard

Fill all three blanks to create a mailer method that sends a notification with a subject, recipient, and uses a template.

Ruby on Rails

def notification_email(user)
  @user = user
  mail([1]: @user.email, [2]: [3])
end

Drag options to blanks, or click blank then click option'

Ato

Bsubject

C"You have a new notification"

Dfrom

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up 'from' and 'to' options.

Not using quotes around the subject string.

The mail method takes to: for recipient email and subject: for the email subject string.