macros.php

<?php

Illuminate\Database\Eloquent\Collection::macro('loadIt', function ($relation) {
    return $this->load($relation)->reduce(function($relations, $model) use ($relation) {
        return $relations->merge($model->{$relation});
    }, new Illuminate\Database\Eloquent\Collection());
});

return $raltion
raltion?

@andrey-helldar , да спс поправил