Add business logic

หมายเหตุ: บทความนี้ยังเป็นภาษาอังกฤษ เนื่องจากคำแปลภาษาไทยกำลังอยู่ระหว่างจัดทำ

Purpose

Choose the smallest server-side mechanism that matches the behavior and keeps authorization, validation, and transactions consistent.

Audience

Application developers and reviewers.

Prerequisites

An application with its tables, permissions, and metadata workflow defined.

Choose the mechanism

Behavior	Use
Record defaults or validation	Hooks and data events
Pre/post lifecycle behavior	Hooks and data events
Explicit user operation	Function/action
Several related registrations	Script
Bounded HTTP or email integration	Async Function/action
Other native or reusable integration	Reviewed TypeScript

Execute related writes inside a transaction through DataContext. A transactional Function is synchronous and atomic. An async Function may await the built-in HTTP and email services, but it must use short explicit ctx.tts() blocks for database writes. Keep validation deterministic, never await network calls inside database transactions, and enforce authorization on the server even when the client hides an action.

Testing

Test success, rejection, rollback, unauthorized access, and concurrent behavior. See Run tests and debug.

Architecture · Testing