Laravel 5.8：未定义属性：Illuminate\Database\Eloquent\Relations\BelongsToMany::$usr_id

Question

我在用户模型和钱包模型之间有多对多关系：

Wallet.php:

public function users() {
    return $this->belongsToMany(User::class,'user_wallet','user_id','wallet_id');
}

和User.php:

public function wallets() {
    return $this->belongsToMany(Wallet::class,'user_wallet','user_id','wallet_id')->withPivot('balance');;
}

然后在 Blade，我尝试了这个：

@forelse($user->wallets as $wallet)
    <tr>
        <td>{{ $wallet->name }}</td>
        <td>{{ $wallet->pivot->balance }}</td>
        <td><a href="{{ route('user.WalletTransaction', ['walletId'=>$wallet->id,'userId'=>$wallet->users()->id]) }}" class="fa fa-exchange text-dark mt-1"></a></td>
    </tr>
    @empty
        <td colspan="5" class="text-center">No wallet exist</td>
    @endforelse

如您所见，我传递了两个参数作为路由名称 user.WalletTransaction，即 link:

{{ route('user.WalletTransaction', ['walletId'=>$wallet->id,'userId'=>$wallet->users()->usr_id]) }}

然后 web.php:

Route::get('wallet/transaction/{wallet}/{user}', 'Wallet\UserWalletController@WalletTransaction')->name('user.WalletTransaction');

但它向我显示了这个错误：

未定义属性: Illuminate\Database\Eloquent\Relations\BelongsToMany::$usr_id

然而 usr_id 是 users table 的用户 ID:

主元 table 结构 user_wallet 是这样的：

那么我怎样才能正确地将用户 ID 添加到 link？

非常感谢你们对此的任何想法或建议...

谢谢。

UPDATE #1:

<a href="{{ route('user.WalletTransaction', ['walletId'=>$wallet->id,'userId'=>$user->id]) }}" class="fa fa-exchange text-dark mt-1" /> 的结果显示两个 link！

Answer 1

$wallet->users() returns 一个集合，所以你需要像迭代 wallets

一样迭代它

@forelse($wallet->users() as $user)
  <td>
    <a href="{{ route('user.WalletTransaction', ['walletId'=>$wallet->id,'userId'=>$user->id]) }}" class="fa fa-exchange text-dark mt-1" />
  </td>
[...]

Laravel 5.8：未定义属性：Illuminate\Database\Eloquent\Relations\BelongsToMany::$usr_id

Laravel 5.8: Undefined property: Illuminate\Database\Eloquent\Relations\BelongsToMany::$usr_id

php

laravel

laravel-5.8

Laravel 5.8：未定义 属性：Illuminate\Database\Eloquent\Relations\BelongsToMany::$usr_id

Laravel 5.8: Undefined property: Illuminate\Database\Eloquent\Relations\BelongsToMany::$usr_id

php

laravel

laravel-5.8

Laravel 5.8：未定义属性：Illuminate\Database\Eloquent\Relations\BelongsToMany::$usr_id