MikroORM is a TypeScript ORM for Node.js based on Data Mapper, Unit of work and Identity Map patterns. It supports MongoDB, MySQL, MariaDB, PostgreSQL and SQLite databases. Heavily inspired by Doctrine and Nextras ORM.
 
It allows handling transactions automatically. When you call em.flush() all computed changes are wrapped inside a database transaction. It uses source code analysis so you do not have to repeat yourself when defining entities. Simply define correct TypeScript types and you are good to go.
 
Its features include:
<ul>
<li>Clean and Simple Entity Definition</li>
<li>Identity Map</li>
<li>Entity References</li>
<li>Using Entity Constructors</li>
<li>Modelling Relationships</li>
<li>Collections</li>
<li>Unit of Work</li>
<li>Transactions</li>
<li>Cascading persist and remove</li>
<li>Composite and Foreign Keys as Primary Key</li>
<li>Filters</li>
<li>Using QueryBuilder</li>
<li>Preloading Deeply Nested Structures via populate</li>
<li>Property Validation</li>
<li>Lifecycle Hooks</li>
<li>Vanilla JS Support</li>
<li>Schema Generator</li>
<li>Entity Generator</li>
</ul>

MikroORM is a TypeScript ORM for Node.js based on Data Mapper, Unit of work and Identity Map patterns. It supports MongoDB, MySQL, MariaDB, PostgreSQL and SQLite databases. Heavily inspired by Doctrine and Nextras ORM.

MikroORM - TypeScript ORM for Node

Prisma helps app developers build faster and
make fewer errors with an open source ORM for PostgreSQL, MySQL and SQLite. It makes database access easy with an auto-generated and type-safe query builder that's tailored to your database schema. It provides an alternative to traditional ORMs and SQL query builders. 
 
Prisma is the perfect companion for building web APIs. It saves repetitive CRUD boilerplate and provides a flexible API for common use cases such as pagination and filtering. Based on the Prisma Schema, Prisma Migrate automatically generates SQL database migrations, that are fully customizable.

Prisma helps app developers build faster and
make fewer errors with an open source ORM for PostgreSQL, MySQL and SQLite. It makes database access easy with an auto-generated and type-safe query builder that's tailored to your database schema. It provides an alternative to traditional ORMs and SQL query builders.

Prisma - Next-generation ORM for Node.js and TypeScript

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MikroORM - TypeScript ORM for Node

Prisma - Next-generation ORM for Node.js and TypeScript

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