Ruby on Rails

Ruby: blocks, procs, lambdas, symbols, 메타프로그래밍, modules와 mixins

Rails 아키텍처: MVC 패턴, config/routes.rb, autoloading, Zeitwerk

Active Record: models, associations (has_many, belongs_to, has_and_belongs_to_many)

AR validations: presence, uniqueness, 사용자 정의 validators, 유효성 검사 컨텍스트

AR callbacks: before_save, after_create, around_update, lifecycle hooks

Migrations: create_table, add_column, change_column, rollback, schema.rb

라우팅: resources, nested routes, namespaces, constraints, route helpers

Controllers: params, strong parameters, filters (before_action), respond_to

Views: ERB 템플릿, partials, helpers, layouts, content_for/yield

Active Record Query: where, joins, includes, preload, eager_load (N+1 방지)

Rails API 모드: API 전용 애플리케이션, serializers (ActiveModel::Serializers, jbuilder)

인증: Devise gem, has_secure_password, 세션 관리, cookies

인가: Pundit gem, CanCanCan, policies, 역할 기반 접근 제어

Action Cable: channels, streams, broadcasting, WebSocket 연결

Active Job: perform_later, queue adapters (Sidekiq), 작업 우선순위, retry logic

Active Storage: attachments (has_one_attached, has_many_attached), variants, direct uploads

테스트: RSpec (describe, context, it), FactoryBot, fixtures, request specs, system tests

Concerns: ActiveSupport::Concern, 코드 재사용성, 모듈 컴포지션

Rails engines: mountable engines, namespacing, gem 개발

성능: fragment caching, Russian doll caching, 쿼리 최적화, bullet gem

보안: CSRF 보호, SQL injection 방지, mass assignment 보호 (strong params)

배포: Capistrano, Heroku, Docker, Puma/Unicorn 서버, assets pipeline