App\Models\UserStatistics\Model::countryRank PHP Method

    public function countryRank()
    {
        if ($this->country_acronym === null) {
            return;
        }
        // Using $this->rank_score isn't accurate because it's a float value.
        // Hence the raw sql query.
        // There's this alternative
        //   rank_score_index < $this->rank_score_index AND rank_score_index > 0 AND rank_score > 0
        // but it is slower.
        return static::where('country_acronym', $this->country_acronym)->where('rank_score', '>', function ($q) {
            $q->from($this->table)->where('user_id', $this->user_id)->select('rank_score');
        })->count() + 1;
    }