Scheduled jobs in Ruby on Rails - Mini Project: Build & Apply

Scheduled Jobs with Rails

📖 Scenario: You are building a simple Rails app that sends daily reminder emails to users. To do this, you need to set up a scheduled job that runs every day and triggers the email sending process.

🎯 Goal: Learn how to create a scheduled job in Rails using Active Job and a scheduler gem. You will set up the job, configure the schedule, and complete the job logic.

📋 What You'll Learn

Create a job class called DailyReminderJob

Set a schedule variable for the job to run daily at 9 AM

Implement the job's perform method to call User.send_daily_reminders

Configure the scheduler to run the job at the specified time

💡 Why This Matters

🌍 Real World

Scheduled jobs are used in real apps to automate tasks like sending emails, cleaning databases, or generating reports without manual intervention.

💼 Career

Understanding scheduled jobs is essential for backend developers and DevOps roles to maintain reliable and automated workflows.

1

Create the job class

Create a job class called DailyReminderJob that inherits from ApplicationJob.

Ruby on Rails

# Create the DailyReminderJob class inheriting from ApplicationJob
# Your code here

Need a hint?

Use class DailyReminderJob < ApplicationJob and set queue_as :default.

2

Set the schedule time

Add a variable called SCHEDULE_TIME in DailyReminderJob and set it to '9:00' to represent 9 AM daily.

Ruby on Rails

class DailyReminderJob < ApplicationJob
  queue_as :default

  # Set the schedule time to 9:00 AM
  # Your code here
end

Need a hint?

Define SCHEDULE_TIME = '9:00' inside the class.

3

Implement the perform method

Inside DailyReminderJob, add a perform method that calls User.send_daily_reminders.

Ruby on Rails

class DailyReminderJob < ApplicationJob
  queue_as :default

  SCHEDULE_TIME = '9:00'

  # Define perform method to call User.send_daily_reminders
  # Your code here
end

Need a hint?

Define def perform and inside call User.send_daily_reminders.

4

Configure the scheduler

In your scheduler configuration file (e.g., config/schedule.rb), add a job to run DailyReminderJob.perform_later every day at DailyReminderJob::SCHEDULE_TIME.

Ruby on Rails

class DailyReminderJob < ApplicationJob
  queue_as :default

  SCHEDULE_TIME = '9:00'

  def perform
    User.send_daily_reminders
  end
end

# Add scheduler config below
# Your code here

Need a hint?

Use every 1.day, at: DailyReminderJob::SCHEDULE_TIME do and inside call runner "DailyReminderJob.perform_later".