ruby-on-rails

This snippet stores user IPs efficiently using the PostgreSQL inet type, which optimizes space and lookup speed. The from_same_network scope allows querying users within the same /24 subnet, useful for analytics or security checks. The update_ip metho

This custom EmailDomainValidator ensures users can only register with emails from approved domains. It extracts the domain from the email and checks it against a predefined list. The User model applies this validation. A challenge is making the allowe

Background jobs improve performance by offloading time-consuming tasks like sending emails. This snippet uses ActiveJob with Sidekiq to send a welcome email asynchronously. The SendWelcomeEmailJob finds the user and triggers the mailer, while the User

This snippet introduces a polymorphic emoji reaction system in Rails, allowing models like Post (or any other) to receive emoji reactions. The Reaction model supports different reactable types via polymorphic: true. A simple emoji regex ensures valid

This snippet ensures every article gets a unique, readable slug based on its title, keeping it short and pronounceable. It grabs the first two words of the title and appends a 4-character random string to prevent duplicates. The before_validation call

This snippet enables a User model to attach an avatar image with just has_one_attached :avatar. The view logic checks if an avatar exists and displays it using image_tag. This approach avoids complex file storage logic, letting Rails handle uploads se

Slugs are essential for SEO-friendly URLs and user-friendly navigation, and this snippet ensures each article automatically generates a unique slug based on its title. Using the before_create callback, we transform the title into a URL-safe format usi

Managing statuses in a Rails model can become messy with hardcoded values, but enums provide a clean and readable way to handle them. This snippet shows how to define an enum in an Order model, making it easy to reference statuses with descriptive sym

This snippet uses PostgreSQL’s JSONB column to store flexible metadata for orders, making it easy to store dynamic attributes without schema changes. The scopes allow efficient filtering using native SQL JSON functions. The update_metadata method enab

This snippet lets you generate secure, one-time-use tokens for password resets without Devise. It stores the token in the database, checks its validity, and clears it after use. The send_reset_link action sends the reset link, and the reset action ver