Usage of Identity Map in MikroORM

identity-map.ts

const authorRepository = orm.em.getRepository(Author);
const jon = await authorRepository.findOne({ name: 'Jon Snow' }, ['books']);
const jon2 = await authorRepository.findOne({ email: '[email protected]' });
const authors = await authorRepository.findAll(['books']);

// identity map in action
console.log(jon === authors[0]); // true
console.log(jon === jon2); // true

// as we always have one instance, books will be populated also here
console.log(jon2.books);