Using entity references in MikroORM

entity-references.ts

const book = orm.em.findOne(Book, '...');
console.log(book.author); // reference with ID only, instance of Author entity

// this will get the same reference as we already have in `book.author`
const author = orm.em.getReference(Author, book.author.id);
console.log(author.id); // accessing the id will not trigger any db call
console.log(author.isInitialized()); // false
console.log(author.name); // undefined
console.log(author === book.author); // true

// this will trigger db call, we could also use `orm.em.findOne(Author, author.id)` to do the same
await author.init(); 
console.log(author.isInitialized()); // true
console.log(author.name); // defined