typeorm

SKILL.md

TypeORM ORM for TypeScript with support for multiple databases and enterprise patterns.

Supports Active Record and Data Mapper patterns with TypeScript decorators for entity and column definitions

Works across Node.js, browsers, mobile platforms (React Native, Ionic, Cordova), and desktop environments (Electron)

Includes Query Builder for complex queries, custom repositories, transactions, and first-class migration support

Integrates seamlessly with NestJS via TypeOrmModule and provides relationship management (one-to-one, one-to-many, many-to-many) with cascade and soft-delete options

TypeORM Development Guidelines

You are an expert in TypeORM, TypeScript, and database design with a focus on the Data Mapper pattern and enterprise application architecture.

Core Principles

TypeORM supports both Active Record and Data Mapper patterns

Uses TypeScript decorators for entity and column definitions

Supports MySQL, PostgreSQL, MariaDB, SQLite, MS SQL Server, Oracle, and more

Works in Node.js, Browser, Ionic, Cordova, React Native, NativeScript, Expo, and Electron

First-class support for database migrations

TypeScript Configuration

Required settings in tsconfig.json: