TypeORM
Build database-driven applications with TypeScript or JavaScript. Supports multiple SQL databases and runs across NodeJS, browser, mobile, and desktop platforms.
TypeORM is an Object Relational Mapper (ORM) that runs in NodeJS, Browser, Cordova, PhoneGap, Ionic, React Native, NativeScript, Expo, and Electron platforms. It can be used with TypeScript and JavaScript (ES5, ES6, ES7, ES8+). Its goal is to always support the latest JavaScript features and provide additional capabilities for database-driven applications, from small projects to large-scale enterprise systems.
It supports both Active Record and Data Mapper patterns, offering flexibility in architectural choices. Key features include:
- Broad database compatibility: Works seamlessly with MySQL, PostgreSQL, MariaDB, SQLite, MS SQL Server, Oracle, SAP Hana, sql.js, and WebSQL.
- First-class TypeScript support: Leverages decorators and types for a strongly-typed development experience.
- Cross-platform execution: Functions consistently across various JavaScript environments.
- Connection pooling: Provides built-in support for managing database connections efficiently.
- Migrations & Schema Sync: Includes tools for managing database schema evolution.
TypeORM offers a robust way to interact with databases using object-oriented principles in modern JavaScript and TypeScript.
- Supports both DataMapper and ActiveRecord (your choice).
- Entities and columns.
- Database-specific column types.
- Entity manager.
- Repositories and custom repositories.
- Clean object-relational model.
- Associations (relations).
- Eager and lazy relations.
- Uni-directional, bi-directional, and self-referenced relations.
- Supports multiple inheritance patterns.
- Cascades.
- Indices.
- Transactions.
- Migrations and automatic migrations generation.
- Connection pooling.
- Replication.
- Using multiple database instances.
- Working with multiple database types.
- Cross-database and cross-schema queries.
- Elegant-syntax, flexible and powerful QueryBuilder.
- Left and inner joins.
- Proper pagination for queries using joins.
- Query caching.
- Streaming raw results.
- Logging.
- Listeners and subscribers (hooks).
- Supports closure table pattern.
- Schema declaration in models or separate configuration files.
- Supports MySQL / MariaDB / Postgres / CockroachDB / SQLite / Microsoft SQL Server / Oracle / SAP Hana / sql.js.
- Supports MongoDB NoSQL database.
- Works in NodeJS / Browser / Ionic / Cordova / React Native / NativeScript / Expo / Electron platforms.
- TypeScript and JavaScript support.
- ESM and CommonJS support.
- Produced code is performant, flexible, clean, and maintainable.
- Follows all possible best practices.
- CLI.
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