What does the course cover?

Ruby 3.x fundamentals, Rails 8 architecture, Hotwire/Turbo/Stimulus, PostgreSQL deep dive, RSpec testing, AI integration with pgvector, and full production deployment.

Do I need prior Ruby experience?

No. The course starts from Ruby fundamentals and progressively builds to advanced Rails patterns and production deployment.

How long do I have access?

Lifetime. Pay once and access everything forever. All future content updates are included at no extra cost.

What projects will I build?

TrailLog, RailsBlog, TaskFlow, RailsAPI, SubscriptionKit, FeedbackKit SaaS, and SmartRails Email production capstone.

Is the course self-paced?

Yes. All content is available immediately on purchase. Learn at your own pace with no deadlines.

Ruby on Rails Mastery Course — Learn Rails 8 from Zero to Production

Get Started

⚙️ Environment Setup

Pick your platform and follow exact steps. Every command shown, every expected output documented. Install Ruby via mise, PostgreSQL, Git, VS Code extensions, and a complete Neovim configuration. Nothing skipped, nothing assumed.

LinuxmacOS Windows WSL2mise PostgreSQLVS Code Neovim

Environment Setup page showing three platform cards: Linux marked as Best, macOS marked as Great, and Windows WSL2 as Recommended path — with step-by-step installation instructions for each

Neovim setup section of the Environment Setup module showing lazy.nvim plugin manager installation commands for Ubuntu, macOS, and Arch Linux, plus ruby-lsp gem installation and init.lua configuration code

Module 1

🔷 Ruby Fundamentals

Ruby 3.x from the ground up. Variables, conditionals, loops, blocks, procs, lambdas, classes, modules, inheritance, mixins, iterators, error handling, and metaprogramming. Every concept has annotated examples and a hands-on exercise with a collapsible solution.

Blocks & ProcsClasses & Modules MetaprogrammingIterators Error Handling175+ Exercises

Ruby Fundamentals module showing annotated code blocks covering arithmetic operators and string concatenation, a TypeError callout explaining Ruby's lack of implicit type coercion, and an interactive exercise section with a full-width dark textarea and collapsible solution panel

Module 2

🚂 Rails Core

MVC end-to-end. ActiveRecord associations, validations, scopes, and callbacks. Routes — resourceful and custom. Action View helpers, partials, and layouts. Migrations with indexes and foreign keys. The full Rails Request/Response cycle explained at every layer.

ActiveRecordRouting Action ViewMigrations ValidationsStrong Parameters

Rails Core module showing MVC architecture, ActiveRecord associations, routing and Action View helpers

Module 3

⚡ Hotwire / Turbo & Stimulus

Modern Rails frontend without a JavaScript framework. Turbo Drive, Turbo Frames, Turbo Streams with live server broadcasts, and Stimulus controllers. Complete working examples for every pattern — including a full live comment feed combining all three.

Turbo DriveTurbo Frames Turbo StreamsStimulus ActionCable

Hotwire and Turbo module showing What is Hotwire with five feature cards: Turbo Drive intercepting link clicks with zero configuration, Turbo Frames for scoped page updates and inline editing, Turbo Streams for server-initiated DOM updates with insert replace remove append prepend actions, Stimulus as a modest JavaScript framework using data-controller attributes, and Action Cable as the Rails WebSocket layer for real-time multi-user features

Module 4

🏛️ Production Rails Architecture

What to do when an app outgrows MVC. Fifteen production-proven design patterns — service objects, query objects, repositories, form objects, state machine workflows, presenters, decorators, serializers, policy objects, notification layers, and more. Real Rails code for every pattern.

Service ObjectsQuery Objects Form ObjectsPresenters Policy ObjectsAASM Workflows

Production Rails Architecture module showing the 15-pattern roadmap table with patterns numbered 01-08 visible — including Rails as a Web Application Framework with rack/rails gems, Active Model and Active Record, More Adapters with activejob/activestorage, Rails Anti-Patterns, Service Objects Not Enough, Data Layer Abstractions with arel, State Transitions and Workflows with aasm, and Handling User Input Outside Models with activemodel with columns for pattern number, chapter title, core abstraction, and key gems — including service objects with dry-initializer, query objects with arel, AASM workflows, form objects with activemodel, and presenters with alba

Module 5

✅ Testing with RSpec

Full RSpec suite from scratch. Model specs with FactoryBot factories and Shoulda-Matchers one-liners. Request specs covering auth flows and JSON responses. System specs with Capybara and headless Chrome. SimpleCov coverage reports. Every spec file shown in full — no snippets.

RSpecFactoryBot Shoulda-MatchersCapybara SimpleCov

Testing with RSpec module showing the How to Use This Module intro section with RSpec versus Minitest comparison, Prerequisites callout, and Step 1 — Create a practice app — with rails new and rails generate scaffold commands plus bundle exec rspec to confirm the test suite runs

Module 6

🚀 Advanced Rails

The topics that separate mid-level from senior Rails developers. Stripe payments (direct gem and Pay gem), OAuth with OmniAuth, fragment and HTTP caching, N+1 query elimination with Bullet, Sidekiq background jobs, Avo admin panel, and performance profiling with Rack::Mini::Profiler.

StripePay gem OAuthCaching SidekiqAvo Admin

Advanced Rails module showing the How to Use This Module intro section with Prerequisites callout listing Rails Core complete, a working Rails 8 app, and Ruby 3.4 installed, plus Step 1 instructions on how to work through each section with side-by-side comparison of direct stripe gem versus Pay gem use cases, including Gemfile snippets, stripe initializer configuration, and CheckoutsController code for one-time payments

Module 7

🎨 Tailwind CSS 4.0

Tailwind ships with Rails 8 by default. This module covers the CSS-first v4 configuration, utility class patterns, component extraction, dark mode, and Hotwire integration patterns. An afternoon of practice and it clicks for good.

CSS-first ConfigUtility Classes Dark ModeComponents

Tailwind CSS 4.0 module showing the How to Use This Module intro with Prerequisites callout and Step 1 — Create a practice Rails app with Tailwind — featuring rails new tailwind-practice --css tailwind and a scaffold command to generate a Post model contrasting Traditional CSS, Bootstrap, and Tailwind — with You Write and Problem columns — followed by a Rails 8 Tailwind 4.0 setup section with code examples

Module 8

🤖 AI & Rails

The highest-value skill in Rails right now. Ruby is architecturally cleaner for AI features than Python. This module covers gem selection, pgvector embeddings, RAG pipelines, SSE token streaming, Vertex AI, OpenAI, Anthropic Claude, and running local models with llama.cpp.

pgvectorRAG Pipelines SSE StreamingVertex AI llama.cppEmbeddings

AI and Rails module showing the How to Use This Module intro section with Prerequisites callout and Step 1 — Create a practice Rails app — featuring rails new ai-practice --database=postgresql and Article scaffold commands listing gemini-ai for Google Vertex AI, ruby-openai for OpenAI GPT-4o, anthropic for Claude, langchainrb for LangChain, pgvector for PostgreSQL vector search, neighbor for nearest-neighbor queries, raix-rails for LLM tool integration, and tokenizers for context management

Module 9

🗄️ SQL Fundamentals

PostgreSQL essentials for Rails developers. 55 exercises against a realistic practice database — 200 customers, 50 products, 800 orders, 300 reviews. SELECT through JOINs, aggregations, NULLs, CASE expressions, and window function basics. The full StoreDB init script is available as a free download.

SELECT · WHEREJOINs AggregationsSubqueries 55 ExercisesFree DB Download

SQL Fundamentals module showing the How to Use This Module intro with Step 1 — Verify PostgreSQL is running showing psql --version command and expected output — and Step 2 — Install DBeaver with platform-specific instructions for Arch Linux and Manjaro using snap or AUR with the SET search_path to store orientation query and a table listing all eight database tables — departments, employees, categories, products, customers, orders, order_items, reviews — with row counts and key columns for each

Module 10

📊 Advanced SQL & PostgreSQL

The PostgreSQL features most Rails developers never touch. Window functions, recursive CTEs, EXPLAIN ANALYZE, pgvector for semantic search, JSONB operators, materialized views, advisory locks, and LISTEN/NOTIFY — all directly applicable to production Rails applications.

Window FunctionsRecursive CTEs EXPLAIN ANALYZEpgvector JSONBAdvisory Locks

SQL Advanced module showing the How to Use This Module intro with Prerequisites callout and Step 1 — Verify StoreDB is still connected — featuring SET search_path TO store; SELECT COUNT(*) FROM orders; and the expected count output with OVER clause syntax, a PARTITION BY code example computing SUM of salary per department alongside individual row salaries, and the SELECT product_id, total_amount window query with running totals

Module 11

📋 Quick Reference

Rails 8 CLI commands, generators, essential gems, Ruby idioms, RSpec matchers, ActiveRecord query methods, Hotwire helpers, and deployment checklists — all on one searchable page. The cheat sheet you keep open in a second tab.

Rails CLIGenerators ActiveRecord APIEssential Gems

Quick Reference page showing the Rails CLI Essential Commands section with new app setup commands including rails new with postgresql, api, and skip-test flags, all generators for models, controllers, scaffolds, and migrations with inline explanation comments

Build Guide Project 1

🥾 TrailLog — Hiking Tracker

Start from rails new and end with a deployed, live app. A hiking tracker where users browse trails, log hikes with photos and ratings, and watch personal stats update live via Turbo Streams. Every command shown. Every file complete. Every decision explained.

Rails 8 from scratchPostgreSQL Active StorageTurbo Streams Rails 8 AuthRSpec Kamal Deploy

TrailLog hiking tracker build guide showing the What You're Building section with four dark feature cards: Trail Catalog for browsing trails by difficulty, state, and distance with Active Storage photos; Hike Logger for recording hikes with duration, rating, and conditions; Live Stats for total miles and elevation updating via Turbo Streams; and Authentication using the Rails 8 built-in generator

Build Guide Project 2

📝 RailsBlog — Publishing Platform

A modern blog engine covering features junior Rails developers typically skip. ActionText rich text editing with Trix, a reusable ViewComponent library, PostgreSQL full-text search with a GIN index and automatic trigger, and live comment updates via Turbo Streams — all built step-by-step from zero.

ActionTextViewComponent PostgreSQL FTSGIN Index Turbo StreamsKamal Deploy

RailsBlog build guide showing ActionText rich text editing, ViewComponent library, and PostgreSQL full-text search implementation

Build Guide Project 3

✔️ TaskFlow — Kanban Board

A real-time Kanban task manager demonstrating AASM state machines for task lifecycle management, optimistic locking via lock_version to prevent race conditions, ActionCable live board updates, and a Stimulus drag-and-drop controller with SortableJS.

AASMOptimistic Locking ActionCableStimulus SortableJS

TaskFlow Kanban build guide showing What You're Building section with four feature cards: Kanban Board with draggable task cards and Stimulus and SortableJS, AASM State Machine with todo in_progress review done archived lifecycle, ActionCable Live for real-time board updates visible to all connected browsers, and Optimistic Locking preventing silent data loss from concurrent edits

Build Guide Project 4

🔌 RailsAPI — Versioned JSON API

API-only Rails demonstrating the backend patterns every Rails developer needs. JWT authentication with access and refresh tokens, versioned endpoints under /api/v1, Blueprinter serializer views, Pagy pagination, and Rack::Attack rate limiting at the middleware layer — before Rails even sees the request.

JWT AuthAPI Versioning BlueprinterRack::Attack RSpec Request Specs

RailsAPI project showing Project 4 with three feature cards: JWT Auth with stateless access tokens 24h and refresh tokens 30d with pure Bearer token flow, Blueprinter for fast declarative JSON serialization with multiple named views, and Rack::Attack for IP-based and token-based rate limiting at the middleware layer before Rails sees the request

Build Guide Project 5

💼 SubscriptionKit — Architecture Patterns in a SaaS

Build a subscription SaaS while applying all 15 production architecture patterns. Service objects, query objects, form objects, and presenters replace fat models and fat controllers. Pay gem handles Stripe subscriptions. Pundit policy objects enforce tenant boundaries. The culmination of the architecture module.

Pay GemStripe Subscriptions PunditMulti-tenancy 15 Architecture Patterns

SubscriptionKit build guide showing a production Rails architecture pattern table with columns for Pattern and Where It Appears — listing Service Objects in SubscriptionService InvitationService BillingService, Query Objects in AccountUsageQuery MembersQuery AuditLogQuery, Form Objects in InvitationForm OnboardingForm BillingForm, Presenters, Policy Objects with Pundit, State Machines for subscription lifecycle, Event Bus, ViewComponent for PlanCard UsageMeter InviteButton, and Multi-Tenancy via CurrentAttributes scoping

Build Guide Project 6

🔨 FeedbackKit — Customer Feedback SaaS

Thirteen phases, one production-ready SaaS. A customer feedback and feature voting platform built on Rails 8 with Solid Queue, Solid Cache, Hotwire real-time vote tallies, Stripe subscriptions, GitHub OAuth, and Kamal deployment. Every phase, every file, every line explained.

Rails 8 SaaSSolid Queue HotwireStripe GitHub OAuthKamal

FeedbackKit build guide showing a 13-phase build roadmap table covering Install and Environment with mise plus Ruby 3.4.8 plus Rails 8.0.2, Testing First with RSpec FactoryBot and Faker from scratch, Start the App with rails new feedbackkit plus Tailwind layout, Users Are Everything with Devise UUID PKs Rolify CanCanCan and invites, Business Models, Service Objects with call notation and notification service, and Background Jobs with Solid Queue welcome email feedback digest and scheduled

Capstone Project

✉️ SmartRails Email — The Flagship Build

A production-grade collaborative email platform — the capstone that uses every Rails skill in one application. Real email receive and send via ActionMailbox and ActionMailer. Real-time presence and typing indicators with ActionCable. AI reply suggestions and thread summarisation via RAG (pgvector + llama.cpp). Natural-language analytics with DuckDB. Deployed to GCP Cloud Run using Kamal — use your own registered domain or the GCP-provided public IP.

ActionMailboxActionCable pgvector RAGllama.cpp DuckDB AnalyticsDevise + Pundit GCP Cloud RunKamal

SmartRails Email capstone build guide showing a 15-chapter build roadmap table with columns for chapter number, title, what you build, and key technology — covering GCP infrastructure setup, new Rails app, data models for User Team Inbox Conversation Email, authentication with Devise and Pundit, receiving email via ActionMailbox and Resend, sending via ActionMailer, inbox UI with threading and recursive CTEs, and real-time updates with ActionCable and Turbo Streams