使用laravel 5.7，数据透视表返回null。*

Question

我有两个qazxsw poi，名为：League和User

有一个models表名为：pivot包含这个结构：

league_user

这是我的型号：

id
user_id
league_id
joined_at
rank
payment_id
created_at
updated_at

和用户模型：

class League extends Model
{
    protected $fillable = [
        'name', 'capacity', 'is_open', 'started_at', 'finished_at', 'is_free', 'price', 'level', 'user_id', 'closed_by', 'edited_by'
    ];

    protected $hidden = [];


    /*
     * User Relationship
     */
    function user()
    {
        return $this->belongsTo(User::class);
    }


    /*
     * Editor Relationship
     */
    public function editor()
    {
        return $this->belongsTo(User::class, 'edited_by');
    }

    /*
     * All users Relationship
     */
    public function all_users()
    {
        return $this->belongsToMany(User::class)->withTimestamps()->withPivot('rank', 'joined_at');
    }
}

现在，当我想访问我的数据透视表中的

class User extends Authenticatable
{
    use Notifiable;

    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'name', 'family', 'email', 'mobile', 'password', 'username', 'team', 'email_verified_at', 'mobile_verified_at', 'role_id'
        ];

    /**
     * The attributes that should be hidden for arrays.
     *
     * @var array
     */
    protected $hidden = [
        'password', 'remember_token',
    ];


    /*
     * Roles ralationship
     */
    public function role()
    {
        return $this->belongsTo(Role::class);
    }

    /*
     * Question Relationship
     */
    public function questions()
    {
        return $this->hasMany(Question::class);
    }

    /*
     * League Relationship
     */
    public function leagues()
    {
        return $this->hasMany(League::class);
    }


    /*
     * Setting Relationship
     */
    public function setting()
    {
        return $this->hasOne(UserSetting::class);
    }


    /*
     * All Leagues that User Joined
     */
    public function all_leagues()
    {
        return $this->belongsToMany(League::class)->withTimestamps()->withPivot('rank', 'joined_at');
    }

}

或rank时，似乎出现了问题，或者至少我是以错误的方式进行操作。

我试过这个：

joined_at

检查我的枢轴行为，我也检查了

foreach ( $leagues as $league )
{
    $pivot[] = $league->pivot;
}

dd($pivot);
}

或$league->pivot->rank，但$league->pivot->joined_at表似乎是空的！

任何人都能告诉我我的代码有什么问题吗？

我看到了这些链接：

pivot

laraveldaily

laracast

和...

Answer 1

如果laravel documentation表与主键league_user，你应该能够访问联赛像

['league_id', 'user_id']

并且可以循环

$user = user::find(1);
$leagues  = $user->leagues;

对于用户模型中的那个应该是

@foreach($leagues as $league)
    {{ $league->rank }}
    {{ $league->joined_at }}
@endofreach

在联盟模式中

class User extends Model
{
    /**
     * The roles that belong to the user.
     */
    public function leagues()
    {
        return $this->belongsToMany('App\League');
    }
}

请参阅

class League extends Model
{
    /**
     * The roles that belong to the user.
     */
    public function users()
    {
        return $this->belongsToMany('App\User');
    }
}