Laravel OrderBy relationship count

Question

I\'m trying to get the most popular hackathons which requires ordering by the respective hackathon\'s partipants->count(). Sorry if that\'s a little difficul

Answer 1

You can also use join operator. As Sabrina said, you can not use sortby at the db level.

$hackathons = Hackathon::leftJoin('hackathon_user','hackathon.id','=','hackathon_user.hackathon_id')
           ->selectRaw('hackathon.*, count(hackathon_user.hackathon_id) AS `count`')
           ->groupBy('hackathon.id')
           ->orderBy('count','DESC')
           ->paginate(5);

But this code takes all records from database. So you should paginate manually.

       $hackathons = Hackathon::leftJoin('hackathon_user','hackathon.id','=','hackathon_user.hackathon_id')
           ->selectRaw('hackathon.*, count(hackathon_user.hackathon_id) AS `count`')
           ->groupBy('hackathon.id')
           ->orderBy('count','DESC')
           ->skip(0)->take(5)->get();

Referred from : https://stackoverflow.com/a/26384024/2186887