Order by relationship's value

If I have a table called users:

| id | username | password |

And a table called user_stats:

| id | user_id | num_posts |

How can I get all users and sort them by the number of posts they have?

My User.php model has this relationship:

public function stats()
{
    return $this->hasOne('App\UserStat');
}

And my UserStat.php model has this relationship:

public function user()
{
    return $this->belongsTo('App\User');
}

I know I can do a join using the query builder, like:

$users = User::join('user_stats', 'users.id', '=', user_stats.user_id')
    ->orderBy('user_stats.num_posts', 'DESC')
    ->get();

But is there a better way to do it using just the Eloquent ORM?

via Chebli Mohamed