Design Patterns

Design Patterns

Trailhead uses common Rails and React design patterns to keep the codebase clean and testable.

Backend Patterns

Pattern	Purpose
Service Objects	Encapsulate API integrations + background sync logic
Serializer Pattern	Controls JSON output shape
ActiveRecord ORM	Model relationships and persistence
Job Pattern	Long-running or scheduled jobs

Frontend Patterns

Pattern	Purpose
Declarative Components	UI defined by props, simple composition
Data Fetching Hooks	Encapsulate API calls in reusable logic
Map Abstraction Layer	Deck.gl manages map rendering separately from data state