Transid 应该是 Laravel Check 中的唯一存储(值 transid 应该是单个存储） - transid should be unique store in laravel check (value transid should be single store)

transid should be unique store in laravel check (value transid should be single store)

我很困惑如何在 laravel 中存储唯一值，我只想存储单个值transaction_id那里不应该有多个值。

            $payment                     = new Payment;
            $payment->order_id           = Input::get('orderid');
            $payment->amount             = (Input::get('base_amount', 0))?Input::get('base_amount'):Input::get('amount');
            $payment->transaction_id     = Input::get('transact');
            how to check if this $payment->transaction_id already exists should not save more than one
            i tried 
            $payment = Payment::where('transaction_id', '=', Input::get('transaction_id'))->first();
            if ($payment === null) {
               $payment->save();
            }

您可以使用请求验证：

public function rules()
{
    return [
        'transaction_id' => 'unique'
    ];
}

如果使用此方法，则应使用 php artisan make:request MyRequest 命令创建新的 Request 类。然后将rules()放入创建的MyRequest中，然后您可以在 RESTful 控制器中的存储/更新操作（函数）旁边使用它：

public function store(MyRequest $request)
{
    dd($request->all());
}

https://laravel.com/docs/5.2/validation

此外，还可以在模型中使用验证：

private $rules = [
    'transaction_id' => 'required'
    ];