MikroORM
Build Node.js apps with a TypeScript ORM using Data Mapper and Unit of Work patterns. Supports SQL/NoSQL, offers schema tools, and automatic query batching.
MikroORM is a TypeScript ORM for Node.js applications, built upon the Data Mapper, Unit of Work, and Identity Map patterns. This approach promotes cleaner code and better separation of concerns compared to Active Record.
Key features include:
- Implicit Transactions: Automatically wraps all computations inside a database transaction when
em.flush()is called. - DRY Entities: Leverages TypeScript's type system, eliminating the need to repeat entity definitions.
- Broad Database Support: Works with SQL databases like PostgreSQL, MySQL, MariaDB, SQLite, and NoSQL databases like MongoDB. Custom drivers allow for further expansion.
- Database Synchronization Tools: Includes a Schema Generator for rapid prototyping, a Migration Generator for creating diffs, and an Entity Generator for introspecting existing database schemas.
- Data Seeding: Provides a Seeder utility with factories to easily generate and populate the database with fake data.
- Automatic Batching: The Unit of Work automatically batches insert, update, and delete queries for efficiency.
- Powerful Events: Offers hooks into the entity lifecycle and Unit of Work operations.
- Query Builder: Features a metadata-aware query builder with auto-joining capabilities.
- Global Filters: Define common query constraints globally, useful for multi-tenancy or soft deletes.
Categories:
Starlight
pdoc
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