Laravel 规则：基于两个请求输入的自定义验证

Question

我想在请求验证中验证用户是否与订单相关联。

订单迁移：

$table->bigIncrements('id');

$table->unsignedBigInteger('user_id')->nullable();

...

$table->timestamps();

$table->softDeletes();

用户表：

$table->bigIncrements('id');
$table->string('name');
$table->string('email')->unique();
$table->timestamps();

我手动创建了一个函数来检查订单是否与用户关联

public function checkIfOrderIsAssociatedWithTheUser(Request $request){
     $checkExistsStatus = Order::where('id',$request->order_id)->where('user_id', $request->user_id)->exists();

    return $checkExistsStatus;
}

当我需要检查关联时，我必须像这样调用这个函数：

$this->validate($request, [
    'order_id' => 'required|exists:orders,id',
    'user_id' => 'required|exists:users,id'
]);

$checkExistsStatus = $this->checkIfOrderIsAssociatedWithTheUser($request);

if(!$checkExistsStatus){
    return redirect()->back()->withErrors([
        'Order and user is not linked'
    ]);
}else{
    ...
}

我尝试创建一个新规则：CheckAssociationBetweenOrderAndUser，但我无法将 user_id 传递给它。

$this->validate($request, [
    //unable to pass user_id
    'order_id' => ['required', new CheckAssociationBetweenOrderAndUser()]
]);

有没有更好的方法通过创建自定义新规则来验证关联检查？或者这是检查关联的唯一方法？

Answer 1

创建自定义规则是一个很好的尝试。您可以在构造函数中将$request 作为参数传递，例如

$this->validate($request, [
    'field' => ['required', new CustomRule ($request)]
]);

namespace App\Rules;

use Illuminate\Contracts\Validation\Rule;
use Illuminate\Http\Request;

class CustomRule implements Rule
{
    protected $request;

    public function __construct(Request $request)
    {
        $this->request = $request;
    }

    ...
}