Laravel 5.2 Eloquent Use of Select in Eagerly Loaded Query - laravel

Question

I can get this to work using a select:
User::whereNotIn('id', $ids)
->select(['id', 'email'])
->with('profile')
->get();
I'd like to only retrieve a couple keys in a user profile that is eagerly loaded. I'd like to do something like this:
User::whereNotIn('id', $ids)
->select(['id', 'email'])
->with(['profile', function ($query) {
$query->select(['id', 'user_id', 'first_name', 'last_name']);
}])->get();
Or:
User::whereNotIn('id', $ids)
->select(['id', 'email'])
->with(['profile', function ($query) {
$query->addSelect(['id', 'user_id', 'first_name', 'last_name']);
}])->get();
But this doesn't seem to work, and I get this error:
ErrorException in Builder.php line 1034:
explode() expects parameter 2 to be string, object given
Thrown in /Illuminate/Database/Eloquent/Builder.php:
/**
* Parse the nested relationships in a relation.
*
* #param string $name
* #param array $results
* #return array
*/
protected function parseNestedWith($name, $results)
{
$progress = [];
// If the relation has already been set on the result array, we will not set it
// again, since that would override any constraints that were already placed
// on the relationships. We will only set the ones that are not specified.
foreach (explode('.', $name) as $segment) { // <--- line 1034
$progress[] = $segment;
if (! isset($results[$last = implode('.', $progress)])) {
$results[$last] = function () {
//
};
}
}
return $results;
}
Is there a way to accomplish this?

Answer 1

Use "addSelect" instead of "select" inside the eager load constraint closure
User::whereNotIn('id', $ids)->select(['id', 'email'])
->with(['profile' => function($query) {
$query->addSelect(['id', 'user_id', 'first_name', 'last_name']);
}])->get();
You have to include the foreign key on the addSelect otherwise nothing will be loaded