Laravel 5急於負荷沒有直接關係

Question

我有一個模型..

模式：

Player 
id,player_name 

Sport 
id,sports_name 

Game 
id,player_id,sports_id,scores 

模型關係

球員的hasMany遊戲，運動小號的hasMany遊戲，遊戲屬於關聯球員和體育。

---

問題：控制器，是可能加載體育每個遊戲每體育在每個球員？

在一個查詢

，我想在我的刀片像這樣實現..

@foreach($player as $p) 
    @foreach ($p->sport as $ps) /*this wont work, since player has not relationship with sports*/ 
    @foreach ($ps->game as $psg) 
     {{$psg->id}} 
     {{$psg->player_name}} 
     {{$psg->sports_name}} 
     {{$psg->scores}} 
    @endforeach  
    @endforeach 
@endforeach 

有沒有其他的方式來實現呢？謝謝！

Answer 1

您可以使用Nested eager loading：玩家有許多遊戲，遊戲屬於一項運動。

$player=Player::with('games','games.sport')->find($id); 
foreach($player->games as $game) 
{ 
    echo $game; 
    echo $game->sport; 
} 

Answer 2

Player和Sport之間的關係也是many-to-many。

所以，你可以在Player模型定義sports關係：

public function sports() 
{ 
    return $this->belongsToMany('App\Sport', 'games')->withPivot('scores'); 
} 

然後在你看來，你可以寫你的foreach爲：

@foreach($player as $p) 
    @foreach ($p->sports as $s) 
     {{$p->player_name}} 
     {{$s->sports_name}} 
     {{$s->pivot->scores}} 
    @endforeach 
@endforeach