What are the differences between TypeORM and Sequelize?

What are the differences between TypeORM and Sequelize?

TypeORM and Sequelize are both popular ORM libraries for Node.js, but they have some key differences. TypeORM is designed for TypeScript and supports both Active Record and Data Mapper patterns, while Sequelize is more focused on JavaScript and follows the Active Record pattern primarily.

Which one is better for a TypeScript project?

For a TypeScript project, TypeORM is generally considered better because it is built with TypeScript in mind, providing better type safety and integration.

Can you give me an example of how to define a model in both?

Sure! In TypeORM, you would use decorators to define a model, like this:

@Entity()
export class User {
  @PrimaryGeneratedColumn()
  id: number;

  @Column()
  name: string;
}

In Sequelize, it would look like this:

const User = sequelize.define('User', {
  id: {
    type: Sequelize.INTEGER,
    primaryKey: true,
    autoIncrement: true,
  },
  name: {
    type: Sequelize.STRING,
  },
});

What about performance? Is one faster than the other?

Performance can vary based on the specific use case and how the ORM is used. Generally, TypeORM may have a slight overhead due to its features, but both can be optimized for performance. It's best to benchmark them in your specific application context.