How I can create entity with foreign key without relation?
Sample entity:

@Table("post")
export class Post {
	@PrimaryGeneratedColumn()
	id: number;

	@Column("bigint")
	authorFk: number; // this field should be foreign key

	author: Author;
}

It needs, because I'm know authorId, but I do not want to do 'SELECT' for get Author entity for create Post. Example:

...
let newPost = new Post();
newPost.authorFk = authorId;
...
this.Repository.persist(newPost);
...

In database authorFk isn't foreign key.

P.S. Entities are invented for the example