TypeORM relationship: Only IDs instead of whole instances

According to the documentation, in TypeORM a relationship is defined as follows: A user has exactly one profile.

import {Entity, PrimaryGeneratedColumn, Column, OneToOne, JoinColumn} from "typeorm";
import {Profile} from "./Profile";

@Entity()
export class User {

    @PrimaryGeneratedColumn()
    id: number;

    @Column()
    name: string;

    @OneToOne(type => Profile)
    @JoinColumn()
    profile: Profile;

}

Issue

When creating a new user, why do I have to pass a complete instance of the entity (profile: Profile) instead of - as usual - only one ID? Like this:

@OneToOne(type => Profile)
    @JoinColumn()
    profileId: number;

Isn't there another way?

This procedure causes a large, unnecessary overhead, if you have to make 4 queries for 4 foreign keys to get the corresponding instance instead of the ID.

I would be very grateful for help to get around this!

In TypeORM the navigation field (here profile) can be combined with the plain foreign key field (profileId). So you can write:

@Entity()
export class User {

    @PrimaryGeneratedColumn()
    id: number;

    @Column()
    name: string;

    @OneToOne(type => Profile)
    @JoinColumn()
    profile: Profile;

    @Column()
    profileId: number;

}

Then it's up to you if you update the relation with the entity object or only with the profile id.