在内部关系中使用JOIN

Question

I have three tables: Tournaments, Participants, Users. The structure is:

Tournaments:

-Id
-Description
-Date

Participants

-Id
-Id_tourn
-Id_user

Users

-Id
-Name

On my blade template I need all the info from Tournaments table and info of the User which is the participant of that tournament.

I've created the relation between Tournaments and User Models.

UPDATE: Tournaments Model:

public function users() {
   return $this->belongsToMany('App\User', 'Participants', 'Id_tourn', 'Id_user');
}

public function getTournaments()
{
    return $this->with('users')->get();
}

Tournament Controller:

public function show()
{
    $tourns = new Tournaments();

    $tournaments = $tourns->getTournaments();
    return $tournaments;
}

but when I try $tournament->users in foreach loop it returns 0 results

Thanks a lot!

Answer 1

It seems you are using a One to Many relationship on a Many to Many case, here are the documentation of the Many to Many relationship. You need to make a relationship like this:

public function users() {
    return $this->belongsToMany('App\User', 'Participants', 'Id_tourn', 'Id_user');
}

So you will can access users like this:

$tournament->users