php - Eloquent:一个表中的两个外键指向同一个表

Question

我有两个模型:

• 团队
• 游戏(在两场比赛之间进行)

Game 模型有两个指向 Team 模型的外键 - team1_id 和 team2_id。

这是团队模型的代码:

class Team extends Eloquent
{
    protected $table = 'team';

    protected $fillable = [
        'name',
        'color',
        'year'
    ];

    public function games()
    {
        return $this->hasMany(\App\Models\Game::class);
    }
}

游戏模型代码:

class Game extends Eloquent
{
    protected $table = 'game';

    protected $casts = [
        'team1_id' => 'int',
        'team2_id' => 'int'
    ];

    protected $fillable = [
        'team1_id',
        'team2_id',
        'location',
        'start_at'
    ];

    public function team1()
    {
        return $this->hasOne(\App\Models\Team::class, 'team1_id');
    }

    public function team2()
    {
        return $this->hasOne(\App\Models\Team::class, 'team2_id');
    }
}

我收到一条错误消息，指出找不到该列。

return $this->hasMany(\App\Models\Game::class, 'team1_id');

这可行，但问题是我想根据 team1_id 和 team2_id 获取游戏。

Answer 1

您必须指定用于引用该关系的外键和本地键

public function localTeam()
{
    return $this->belongsTo(\App\Models\Team::class, 'id', 'team1_id');
}

public function foreignTeam()
{
    return $this->belongsTo(\App\Models\Team::class, 'id', 'team2_id');
}