Rails Conventions & Patterns

Rails conventions emphasize skinny controllers and fat models, keeping business logic in models and ActiveRecord. For complex logic, extract into service objects. Use Rails 7.1+ or 8.0+ with modern patterns like composite primary keys and ActiveRecord encryption for production apps running Ruby 3.2+.

Rails naming conventions standardize models, controllers, and database tables for readability and maintainability. Follow singularized model names (User), pluralized controllers (UsersController), and snake_case for files and database columns. Document these patterns across your codebase for consistency.

Rails 7.1+ includes ActiveRecord::Encryption for transparent encryption and normalization features for standardized data storage. Use these built-in tools instead of external gems to simplify production apps and maintain Rails idioms across models and schemas.

Rails 8.0+ with Ruby 3.3+ is recommended for new projects, offering Solid Queue, Solid Cache, and modern features. Existing projects should target Rails 7.1+ with Ruby 3.2+ minimum. Plan migrations to access pattern matching, encryption, and horizontal sharding capabilities.

Extract complex business logic into service objects when controllers or models grow beyond single responsibility. Service objects encapsulate multi-step workflows, external API calls, or cross-model operations, keeping your codebase organized and testable.

Rails 7.1+ supports horizontal sharding for distributing data across databases. Follow Rails conventions when implementing sharding strategies: keep models and migrations aligned, use composite primary keys where needed, and document sharding rules for team consistency.