@RelationId((엔티티: 엔티티타입) =>누구의 relation id인지 명시)
relation의 id를 로드 함
Ex)
@Entity()
export class Post {
@ManyToOne((type) => Category)
category: Category;
@RelationId((post: Post) => post.category) // you need to specify target relation
categoryId: number;
}
https://github.com/typeorm/typeorm/blob/master/docs/decorator-reference.md#relationid