Php laravel用关系雄辩地标记对象

在视图中

class PaymentMethod extends Model
{
     ....

    public function user()
    {
        return $this->belongsTo(User::class, 'user_id', 'id');
    }
    ...
}

class User extends Authenticatable
{
    ...

    public function payment_methods()
    {
        return $this->hasMany(PaymentMethod::class, $this->getForeignKey())->orderBy('created_at', 'desc');
    }

    public function default_payment_method()
    {
        return $this->hasOne(PaymentMethod::class, 'id', 'default_payment_method_id');
    }


    ...
}

@if（$user->getDefautPaymentMethod（）->type==PaymentMethod:：PAYPAL\u账户）
Paypal:{{$user->getDefautPaymentMethod（）->Paypal\u email}
@否则
卡片：{{$user->getDefautPaymentMethod（）->Card_brand}*********{{$user->getDefautPaymentMethod（）->Card_last_four}
@恩迪夫

这工作做得很好。并为用户输出默认的付款方式

但我不想为用户输出所有付款方法。如果这是用户的默认值，则为每个方法输出标签

我不想在cicle中使用DB:：RAW或sub查询

@if($user -> getDefautPaymentMethod()->type == PaymentMethod::PAYPAL_ACCOUNT)
    <div><strong>Paypal: </strong> {{$user -> getDefautPaymentMethod()-> paypal_email}}</div>
@else
    <div><strong>Card: </strong>{{$user -> getDefautPaymentMethod()-> card_brand}} **** **** **** {{$user -> getDefautPaymentMethod()-> card_last_four}}</div>
@endif

@foreach（$user->payment\u methods（）->get（）作为$payment\u method）
@如果（$payment\u method->type==PaymentMethod:：PAYPAL\u账户）
贝宝：{{$payment\u method->Paypal\u email}
@否则
卡：{{$payment\u method->Card\u brand}*********{{$payment\u method->Card\u last\u four}
@恩迪夫
@endforeach

---

如果方法默认，如何影响此cicle和模型代码的输出？

您可以循环查看付款方法，并将ID与默认付款方法的ID进行比较。它们可以匹配，您知道这是默认值

    @foreach($user->payment_methods()->get() as $payment_method)
        @if($payment_method ->type == PaymentMethod::PAYPAL_ACCOUNT)
            <div><strong>Paypal: </strong> {{$payment_method -> paypal_email}}</div>
        @else
            <div><strong>Card: </strong>{{ $payment_method -> card_brand }} **** **** **** {{$payment_method -> card_last_four}}</div>
        @endif
    @endforeach

@foreach（$user->payment-methods（）->get（）作为$payment\u方法）
@如果（$user->get\u default\u payment\u method（）->id===$payment\u method->id）
默认付款方式
@恩迪夫
{{$payment_method}}
@endforeach

我找到了解决方案：

@foreach ($user->payment-methods()->get() as $payment_method)
    <div>
        @if ($user->get_default_payment_method()->id === $payment_method->id)
            <strong>Default Payment Method</strong>
        @endif
        {{ $payment_method }}
    </div>
@endforeach

public函数defaultForUser（）
{
返回$this->belongsTo（用户：：类，'id'，'default\u付款方法\u id'）；
}
付款方式
@foreach（$user->payment\u methods（）->withCount（'defaultForUser'）->get（）作为$payment\u方法）
id:{{$payment\u method->id}
网关id:{{$payment\u method->braintree\u id}
@如果（$payment\u method->type==PaymentMethod:：PAYPAL\u账户）
贝宝：{{$payment\u method->Paypal\u email}
@否则
卡：{{$payment\u method->Card\u brand}*********{{$payment\u method->Card\u last\u four}
@恩迪夫
@如果（$payment\u method->default\u for\u user\u count）
默认值
@恩迪夫
@endforeach

öimk_很好。但我选择了另一种方法

public function defaultForUser()
{
    return $this->belongsTo(User::class, 'id', 'default_payment_method_id');
}

<h3>Payment methods</h3>
<table border="1">
<tr><th></th><th></th><th></th></tr>
@foreach($user->payment_methods()->withCount('defaultForUser')->get() as $payment_method) 
    <tr>
    <td>
        <div><strong>id:</strong> {{$payment_method->id }}</div>
        <div><strong>gateway id:</strong> {{ $payment_method->braintree_id }}</div>
    </td>
    <td>
        @if($payment_method ->type == PaymentMethod::PAYPAL_ACCOUNT)
            <div><strong>Paypal: </strong> {{$payment_method -> paypal_email}}</div>
        @else
            <div><strong>Card: </strong>{{ $payment_method -> card_brand }} **** **** **** {{$payment_method -> card_last_four}}</div>
        @endif

    <td>
        @if ($payment_method -> default_for_user_count)
            <strong style = "color:green">Default</strong>
        @endif
    </td>
    </td>
    </tr>
@endforeach
</table>