Migrations version control database schema changes, making them trackable and reversible. Each migration file contains up() and down() methods defining changes and rollbacks. I use the Schema builder's fluent API to create tables, add columns, define

Action Text is great, but you need to be deliberate about how you render it in a Turbo-powered UI. I keep the comment form inside a turbo_frame_tag so it can be replaced on validation errors (still 422). On success, I clear the form by replacing the f

React Router v6 provides declarative routing with data loading and authentication guards. I wrap protected routes in a ProtectedRoute component that checks authentication state from context and redirects to login if needed. The Navigate component hand

Debugging distributed requests is miserable without a stable request id, so I generate it once at the edge, echo it back via x-request-id, and attach it to every log line with a child logger. I keep this intentionally boring because it delivers 80% of

Server-side validation is the source of truth, but raw error payloads are rarely UI-friendly. I normalize validation errors into a Record<field, message> shape so forms can render them consistently. The tricky detail is mapping server field path

Cow<'a, T> (clone on write) holds either a borrowed or owned value. It borrows when possible and clones only when mutation is needed. I use Cow<str> for APIs that might need to modify a string: if no changes are needed, it stays borrowed;

For admin-ish UIs, inline editing is the best balance of speed and clarity. I wrap each row in a turbo_frame_tag keyed by dom_id(record) and render either a read-only row partial or an edit form partial inside the same frame. Clicking “Edit” targets t

Clients love predictable pagination. Provide Link headers and totals when feasible. This snippet shows a small helper that generates RFC5988-ish link headers for JSON endpoints.

Unit testing verifies individual components in isolation. I use JUnit 5 or JUnit 4 as the test framework with @Test annotations. MockK provides Kotlin-friendly mocking—mockk<T>() creates mocks, every { } stubs behavior, verify { } confirms calls

When toasts are appended via Turbo Streams, they should self-dismiss without extra wiring. I attach a Stimulus controller to the toast element that schedules removal after a delay (and allows manual close). This means the server only needs to render a

The most common transaction bug I see is forgetting to roll back on early returns. With pgx, I like the “defer rollback” pattern: start the transaction, defer tx.Rollback(ctx), then call tx.Commit(ctx) only on success. Rollback after a successful comm

LISTEN/NOTIFY provides real-time pub-sub messaging. Publishers send notifications via NOTIFY. Subscribers receive notifications via LISTEN. I use it for cache invalidation, real-time updates, inter-process communication. Payloads up to 8000 bytes carr