Digging Deeper

The Digging Deeper section covers Wheels’ advanced features — the ones you reach for after the tutorial and The Basics have you building working apps. Each page is a task-oriented how-to, not a reference. Pick whichever topic matches what you need right now.

You’ll find:

• Authentication strategies and authorization filters
• Background jobs, caching, and email
• File uploads, server-sent events, internationalization
• Multi-tenancy, packages, CORS, rate limiting
• Advanced use of the dependency injection container and route model binding

All Digging Deeper guides

Authentication Patterns Session auth, JWT, and API tokens — rolling your own vs using built-in strategies.

Authorization & Filters Filters for access control — authentication gates, ownership checks, role rules, policies.

Background Jobs Queue work for asynchronous processing — retries, priorities, and the worker process.

Caching Action, fragment, view, and query caching — stores, keys, and invalidation.

Sending Email SMTP config, multi-part bodies, attachments, and async sends via background jobs.

File Uploads & Downloads Multipart uploads, storage backends, validation, and serving downloads safely.

Server-Sent Events Stream updates to the browser over plain HTTP — one-shot responses and long-lived streams.

Internationalization Locale detection, translation files, and formatting — the manual pattern and the roadmap.

Multi-tenancy Serve multiple tenants — three strategies, the TenantResolver middleware, per-request isolation.

Packages Activating first-party packages, writing your own, and the package.json manifest.

Debug Panel The built-in dev debug bar — request details, timing, params, packages, and developer tool links.

Route Model Binding Load records from the URL automatically — opt-in, global, and scope-level.

CORS Configure cross-origin requests — allowed origins, preflight, credentials, per-route.

Rate Limiting Throttle requests — three strategies, memory vs database storage, custom keying.

Dependency Injection Usage Practical DI patterns — test-double swapping, per-request resolvers, factories.

See also

• Core Concepts — the explanations behind what these guides show you how to do
• The Basics — the prerequisite how-tos for routing, controllers, models, views
• Testing — test each of these features