B4nan/deep-assign-2.ts

## deep-assign-2.ts
const book = await em.findOneOrFail(Book, 1, { populate: ['author'] });

// update existing book's author's name
wrap(book).assign({
  author: {
    name: 'New name...',
  },
}, { updateByPrimaryKey: false });
	const book = await em.findOneOrFail(Book, 1, { populate: ['author'] });

	// update existing book's author's name
	wrap(book).assign({
	author: {
	name: 'New name...',
	},
	}, { updateByPrimaryKey: false });