Ruby on Rails Official Guides

Canonical official guides for learning and reference across all Rails features.

The Rails Guides site is the canonical place for learning and referencing Rails features, from routing, ActiveRecord, action controller, security, to performance tuning. 

For any developer, especially in categories like Authentication & Security, APIs & Integrations, and Performance & Optimisation, these guides are indispensable. 

They are maintained by the Rails core team, aligned with current Rails versions, and often first in search results for Rails topics.