Email previews in Ruby on Rails - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a mailer preview class in Rails.

Ruby on Rails

class UserMailerPreview < [1]
end

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AApplicationMailer

BApplicationController

CActionController::Base

DActionMailer::Preview

Attempts:

3 left

💡 Hint

Common Mistakes

Using ApplicationMailer instead of ActionMailer::Preview

Confusing controllers with mailers

Forgetting to inherit from any class

Mailer preview classes in Rails inherit from ActionMailer::Preview to enable previewing emails.

2fill in blank

medium

Complete the method to preview the welcome email for a user.

Ruby on Rails

def welcome_email
  UserMailer.[1](User.first)
end

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Awelcome_email

Bemail_welcome

Cnew_welcome

Dsend_welcome

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect method names that don't exist in the mailer

Adding extra prefixes or suffixes to the method name

The mailer method to preview is usually named after the email, here welcome_email.

3fill in blank

hard

Fix the error in this preview method to correctly return the mail object.

Ruby on Rails

def notification_email
  mail = UserMailer.notification_email(User.last)
  [1] mail
end

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Adeliver_now

Breturn

Csend

Drender

Attempts:

3 left

💡 Hint

Common Mistakes

Calling deliver_now or send which sends the email instead of previewing

Not returning the mail object causing preview to fail

Preview methods must return the mail object, so return mail is correct.

4fill in blank

hard

Fill both blanks to define a preview method that previews an email with a sample user and a token.

Ruby on Rails

def reset_password_email
  user = User.find_by(email: [1])
  UserMailer.reset_password_email(user, [2])
end

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A"[e-mail]"

B"sample_token_123"

C"[e-mail]"

D"token_abc"

Attempts:

3 left

💡 Hint

Common Mistakes

Using variable names instead of string literals

Using emails or tokens that don't exist in test data

Use a sample email string and a sample token string to preview the reset password email.

5fill in blank

hard

Fill all three blanks to create a preview method that sends a newsletter email to a user with a subject.

Ruby on Rails

def newsletter_email
  user = User.find_by(email: [1])
  subject = [2]
  UserMailer.newsletter_email(user, subject: [3])
end

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

A"[e-mail]"

B"Monthly Update"

Csubject

D"Weekly News"

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the subject string directly instead of the variable

Using inconsistent variable names

Use a sample email string for the user, assign a subject string, and pass the subject variable to the mailer.