migration-script-runner / msr-core / dccc1b49-284a-4ed8-8e08-bc6d96b7353b

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Pull #148

circleci

#147: Add createInstance factory for async adapter initialization

Added standardized factory pattern for database adapters requiring async initialization.

Changes:
- MigrationScriptExecutor.ts: Added protected static createInstance() helper (lines 205-296)
  - Supports all 5 generics: DB, THandler, TExecutor, TConfig, TOptions
  - Reduces boilerplate from ~10 lines to 3 lines per adapter
- Added 6 comprehensive tests covering all generic parameters and error cases

Documentation (async-first approach - 9/10 adapters are async):
- getting-started.md: Restructured to show async pattern FIRST
- cli-adapter-development.md: Updated Quick Start and Complete Example with async
- api/core-classes.md: Added createInstance() method documentation
- design-patterns.md: Added async adapter factory pattern section

Benefits:
- Standardized pattern across ecosystem
- Type-safe with zero boilerplate
- Handles async connections, auth, pooling naturally

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