Laravel 5.3 withCount() nested relation

34
votes

The model structure is as follows

Tutorial -> (hasMany) Chapters -> (hasMany) videos

How can we load number of videos (video_count) from Tutorial Model with laravel 5.3's withCount() method

I have tried:

Tutorial::withCount('chapters')
->withCount('chapters.videos') // this gives error: Call to undefined method Illuminate\Database\Query\Builder::chapters.videos()
->all();

Edit

This works, Any Better solution?

Tutorial::withCount('chapters')
->with(['chapters' => function($query){
    $query->withCount('videos');
}])
->all();
1
phpeloquentlaravel-5.3
Have you define relationship in models? – Mehul Kuriya
You only need to do one ->withCount('chapters.videos'). Also, make sure your relationships are set properly. – user908157
@DigitalFire Relationships are correct as i can load them with eager loading. just count doesn't populates with withCount() method – Sahil Deliwala
Please post your edit in answers section. I just prefer to do that. – Maulik

1 Answers

52
votes

You can only do a withCount() on a defined relation of the model.

However, a relationship can be hasManyThrough which would achieve what you are after.

class Tutorial extends Model
{
    function chapters()
    {
        return $this->hasMany('App\Chapter');
    }

    function videos()
    {
        return $this->hasManyThrough('App\Video', 'App\Chapter');
    }
}

And then you can do:

Tutorial::withCount(['chapters', 'videos'])

Docs: