Mailer generation and templates in Ruby on Rails - Mini Project: Build & Apply

Mailer generation and templates

📖 Scenario: You are building a simple Rails app that sends welcome emails to new users.To do this, you need to create a mailer and a template for the email content.

🎯 Goal: Create a mailer called UserMailer with a method welcome_email that sends an email to a user.Also, create a simple email template that shows a welcome message with the user's name.

📋 What You'll Learn

Generate a mailer named UserMailer

Add a method welcome_email that accepts a user parameter

Set the email to address to user.email

Set the email subject to 'Welcome to Our App!'

Create a view template for welcome_email that displays 'Hello, !'

💡 Why This Matters

🌍 Real World

Sending emails is common in web apps for welcoming users, notifications, and password resets.

💼 Career

Understanding mailers is essential for backend Rails developers working on user communication features.

1

Generate the mailer class

Create a mailer class called UserMailer that inherits from ApplicationMailer.

Ruby on Rails

# Create the UserMailer class inheriting from ApplicationMailer
# Your code here

Need a hint?

Use class UserMailer < ApplicationMailer to start the mailer class.

2

Add the welcome_email method

Inside UserMailer, add a method called welcome_email that takes a user parameter.

Ruby on Rails

class UserMailer < ApplicationMailer
  # Define welcome_email method with user parameter
  # Your code here
end

Need a hint?

Define a method with def welcome_email(user) inside the class.

3

Set email recipient and subject

Inside the welcome_email method, use mail to set the to address to user.email and the subject to 'Welcome to Our App!'.

Ruby on Rails

class UserMailer < ApplicationMailer
  def welcome_email(user)
    # Use mail to set to and subject
    # Your code here
  end
end

Need a hint?

Use mail(to: user.email, subject: 'Welcome to Our App!') inside the method.

4

Create the email template

Create a view template file named welcome_email.html.erb inside app/views/user_mailer/ that displays the text 'Hello, <%= @user.name %>!'. Also, assign @user = user inside the welcome_email method.

Ruby on Rails

class UserMailer < ApplicationMailer
  def welcome_email(user)
    # Assign @user for the template
    # Your code here
    mail(to: user.email, subject: 'Welcome to Our App!')
  end
end

# Create welcome_email.html.erb in app/views/user_mailer/
# Your code here

Need a hint?

Assign @user = user in the method and create the template with 'Hello, <%= @user.name %>!'.