composer require mistery23/eloquent-object-relations

If you use value object wrap in id primary key, or foreign key (your value object by id need to implement magic method __toSting()), or primary key is string.

Work with relations: BelongsTo, BelongsToMany, HasOne, HasMany.

use Mistery23\ObjectRelations\HasObjectRelations;

class User extends Model
{
    use HasObjectRelations;
    ....
}