app\models\Beatmapset::qualify PHP Method

    public function qualify()
    {
        if (!$this->isPending()) {
            return false;
        }
        DB::transaction(function () {
            $this->events()->create(['type' => BeatmapsetEvent::QUALIFY]);
            $this->approved = self::STATES['qualified'];
            $this->approved_date = Carbon::now();
            $this->save();
        });
        return true;
    }