Appending attributes based on scope

[chelout]

Hi, i'm looking into using package in my project and have a question about appending attributes.
I'd like to add conditional attributes to response based on query result.

Let's say i have Post model with comments relation

class Post extends Model {
    public function comments()
    {
        return $this->morphToMany(Comment::class, 'commentable');
    }

    public function scopeWithCommentsStatistics(Builder $query)
    {
        $query->/** Some complex query, which counts additional columns **/
    }

    public function getCommentsStatisticsAttribute()
    {
        return [
            // additional columns from withCommentsStatistics() scope
        ];
    }
}

I can get posts list from PostController like this:

class PostController extends Controller
{
    public function index()
    {
        $posts = QueryBuilder::for(Post::class)
            ->allowedFilters([
                AllowedFilter::scope('comments_statistics', 'withCommentsStatistics'),
            ])
            ->allowedAppends(['comments_statistics'])
            ->get();

        return PostResourceCollection::make($deals);
    }
}

With following request /post?filter[comments_statistics]=1&append=comments_statistics

So the question is there any way to get my comments_statistics attribute with only /post?append=comments_statistics?

It could be done applying withCommentsStatistics() scope to all queries, like global scope, but i don't feel like having complex part of query in all queries that works with Post model.

Thanks!