rails

Scheduling/booking is tricky. Postgres exclusion constraints prevent overlapping time ranges at the database layer—far more reliable than application checks. Rails can still validate, but the DB is the source of truth.

A good Hotwire endpoint responds to both Turbo and non-Turbo clients. Use respond_to and render a turbo stream that prepends the new record and updates flash/errors, while keeping an HTML fallback for crawlers, redirects, and manual testing.

Flash updates are common enough to deserve a first-class stream action. Defining a custom turbo-stream action keeps views tidy: instead of repeating turbo_stream.update, you can write <turbo-stream action="flash">.

ViewComponents bring object-oriented design to Rails views, making complex UI elements testable and reusable. Each component is a Ruby class paired with a template, encapsulating both logic and presentation. I use components for buttons, cards, modals

ViewComponent brings component architecture to Rails views. Components encapsulate markup, logic, and tests in Ruby classes. I use ViewComponents for reusable UI elements—buttons, cards, modals, alerts. Components accept parameters via initializer, ke

Webhooks are a security boundary. Verify signatures with constant-time compare, include a timestamp window to prevent replay, and store processed event IDs to make handlers idempotent.

Polymorphic associations allow a model to belong to multiple other models through a single association, which is useful for shared behaviors like comments, likes, or attachments. Instead of separate post_id and article_id columns, a polymorphic associ

Hotwire forms feel “native” when invalid submissions keep you in context. Replace just the form frame with errors and keep the rest of the page intact. Return 422 so clients and caches behave correctly.

Memoization is useful, but it should be scoped. Memoize within the instance/request, never globally. This is a simple way to avoid repeated expensive DB reads inside a view render.

Sorting is a great candidate for Turbo Frames: clicking “Newest” shouldn’t reload your whole page shell. I wrap the list in a frame (e.g., id='results') and make sort links target that frame. The controller reads params[:sort] and applies an order sco

If you have a queue table, avoid races by selecting and updating in one statement. Postgres UPDATE … RETURNING is the simplest building block for a correct custom queue / maintenance pipeline.

A “follow” button usually needs two updates: the button label/state and the follower count. Turbo Streams make this trivial because one server response can carry multiple DOM operations. I render both UI pieces as partials with stable targets (dom_id(