A practical guide to upgrading from Rails 6.1 to Rails 7 with Import Maps, Hotwire, Ruby 3 compatibility, and encrypted attributes.

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A step-by-step guide to upgrading a Rails 6.1 application to Rails 7, covering Ruby 3 migration (including YJIT enablement and keyword argument fixes), Gemfile updates, JavaScript strategy selection (Import Maps vs Webpacker/jsbundling), Hotwire installation (Turbo Drive, Frames, Streams, and Stimulus), ActiveRecord encryption for sensitive attributes, new query methods like `sole` and `load_async`, breaking changes (ActiveStorage::Current removal, Zeitwerk-only autoloading, button_to HTML change), testing updates for Turbo, and deployment considerations. Includes a practical upgrade checklist and common gotchas.

Upgrading from Rails 6.1 to Rails 7 - The Modern Stack