rails-activerecord

name	rails-activerecord
description	Active Record: models, associations, validations, callbacks, scopes, and query interfaces. Use when working with persistence layer.

Active Record

Model data with clear associations, validations, and query objects.

When to Use This Skill

• Associations and validations
• Scopes and where chains
• Counter caches and touch

Defaults (This Plugin)

• Toolchain: mise — not rbenv, rvm, or asdf directly
• Ruby: 4.0.0+ unless the project pins otherwise
• Rails: 8+ conventions and generators when applicable
• Execution: Prefer mise exec --, bin/rails, bin/rspec, and bundle exec

Core Guidance

1. Associations: Declare dependent: explicitly; prefer inverse_of where helpful.

2. Validations in model; database constraints for integrity (uniqueness with concurrency).

3. Callbacks sparingly — prefer explicit service calls over callback chains.

4. Query: Use includes/preload/eager_load intentionally; extract complex SQL to scope classes or app/queries.

5. Enums and Rails 8 attributes API for typed attributes.

6. Console:

mise exec -- bin/rails console

Quick Commands

mise exec -- bin/rails console
mise exec -- bin/rails dbconsole

Anti-Patterns

• default_scope hiding data unexpectedly
• update_column skipping validations/callbacks without intent
• Raw SQL strings without binds

See Also

• rails-database-migrations
• rails-performance