laravel get relationship with multiple foriegn keys - php

Question

I have three tables
Teams
id | Name
Winners
id | user_id | league_id
team_user
team_id | user_id | league_id
What I am trying to do in my Winner.php model is create a relationship that ties a winner to a team via the user_id and league_id
So basically I can call Winner->team and it will return the Team that the Winner belongs to where the user_id and league_id all match.
I was thinking
public function team()
{
return $this->belongsTo('App\Team', 'user_id', 'league_id');
}
But that doesnt work obviously. I am scratching my head since I have all the info I need to get the team associate to that league_id and user_id.

Answer 1

if your winner model returns multiple team use below code:
public function teams()
{
return $this->belongsToMany('App\Team', 'user_id', 'league_id');
}
if your winner model returns only one team use below code:
public function team()
{
return $this->belongsTo('App\Team', 'user_id', 'league_id');
}
Note:Here 3rd parameter in belogsTo() specifying your parent table's custom key

Answer 2

You can attach additional where() clause:
public function team()
{
return $this->belongsTo('App\Team', 'user_id', 'user_id')->where('league_id', $this->league_id);
}
Note: This will work with lazy loading only. Look here, it may help you.

Answer 3

I just used this as a function and not a relationship and looped through in my controller. not the best but all I got to work:
Winner.php
public function team()
{
$team_id = DB::table('team_user')
->where('league_id', $this->league_id )
->where('user_id', $this->user_id )
->first()
->team_id;
$team = Team::find( $team_id );
return $team;
}
In my controller
foreach( $league->winners as $winner)
{
$winner['team'] = $winner->team();
}