Query constraints for an eager loading query

relation.php

// suppose `brothers` has a user_id foreign key

class User extends Model
{
    public function brothers() {
        return $this->hasMany('App\Brother');
    }
}

// bad way
return App\User::with(['brothers' => function($query) {
  $query->select('name'); // if you forget user_id, the resultant collection will have empty arrays for `brothers`
}]);

// good way
return App\User::with(['brothers' => function($query) {
  $query->select('name', 'user_id'); // could be this foreign key be selected automatically?
}]);