在 laravel 中验证时出现致命异常“Method Illuminate\Validation\Rules\RequiredIf::__toString() 不得抛出异常”答案

【问题标题】：Fatal exception "Method Illuminate\Validation\Rules\RequiredIf::__toString() must not throw an exception" when validating in laravel在 laravel 中验证时出现致命异常“Method Illuminate\Validation\Rules\RequiredIf::__toString() 不得抛出异常”
【发布时间】：2020-09-28 20:46:26
【问题描述】：

我正在使用 Laravel。我想验证一个复杂的请求输入，但是当我使用 requiredIf 方法时会启动一个致命异常，因此我无法读取验证器的所有错误。例如，如果输入 $request->assistanceRequest['source'] 不存在，则验证不起作用，因为抛出以下异常：

Method Illuminate\Validation\Rules\RequiredIf::__toString() must not throw an exception, caught ErrorException: Undefined index: source

这是控制器中的代码：

$rules = array( 
    'assistanceRequest.requestType' => 'required|exists:request_types,variable',
    'assistanceRequest.deliveryMode' => 'required|in:NORMAL,FAST',
    'assistanceRequest.creationDate' => ['required', 'regex:@^[0-9]{4}-(0[1-9]|1[0-2])-(0[1-9]|[1-2][0-9]|3[0-1]) (2[0-3]|1[0-9]|0[0-9]):[0-5][0-9]:[0-9]{2}$@'],
    'assistanceRequest.source' => 'required',
    'assistanceRequest.language' => ['required', 'regex:@^[A-Z]{2}$@'], 
    'assistanceRequest.country' => ['required', 'regex:@^[A-Z]{2}$@'], 
    'customer.customerId' => 'required|integer',
    'customer.login' => 'required',
    'customer.companyName' => 'required',
    'customer.phoneNumber' => 'required',
    'customer.email' => ['required', 'regex:&^\S+@\S+\.\S+$&'], 
    'vehicle.plateNumber' => 'required', 
    'vehicle.Country' => ['required', 'regex:@^[A-Z]{2}$@'], 
    'vehicle.frenchRegistration' => '',
    'vehicle.vin' => 'required|min:17|max:17',
    'vehicle.variationId' => 'required|integer|max:9999999',
    'vehicle.makeLabel' => 'required',
    'vehicle.modelLabel' => 'required',
    'vehicle.variationLabel' => 'required',
    'vehicle.bodyLabel' => Rule::requiredIf(function () use ($request) {
        return $request->assistanceRequest['source'] == "ATD"; //example problem
    }),
    'vehicle.releaseDate' => 'required|date_format:Y-m-d', 
    'vehicle.specificitiesOptions' => '',
    'vehicle.mileage' => Rule::requiredIf(function () use ($request) {
        return $request->assistanceRequest['requestType'] !== "SERVICE_PLAN"; 
    }),
    'vehicle.distanceUnit' => Rule::requiredIf(function () use ($request) {
        return $request->assistanceRequest['requestType'] !== "SERVICE_PLAN"; 
    }),
    'requestInformations.category' => Rule::requiredIf(function () use ($request) {
        return ($request->assistanceRequest['requestType'] == "TECHNICAL_DATA" or $request->assistanceRequest['requestType'] == "REPAIR_METHOD" or $request->assistanceRequest['requestType'] == "WIRE_DIAGRAM") and $request->assistanceRequest['source'] == 'ATD'; //chiedere e modificare 5
    }),
    'requestInformations.subCategory' => Rule::requiredIf(function () use ($request) {
        return ($request->assistanceRequest['requestType'] == "TECHNICAL_DATA" or $request->assistanceRequest['requestType'] == "REPAIR_METHOD" or $request->assistanceRequest['requestType'] == "WIRE_DIAGRAM") and $request->assistanceRequest['source'] == 'ATD'; //chiedere e modificare 5
    }),
    'requestInformations.informationCode' => Rule::requiredIf(function () use ($request) {
        return ($request->assistanceRequest['requestType'] == "TECHNICAL_DATA" or $request->assistanceRequest['requestType'] == "REPAIR_METHOD" or $request->assistanceRequest['requestType'] == "WIRE_DIAGRAM") and $request->assistanceRequest['source'] == 'ATD'; //chiedere e modificare 5
    }),
    'requestInformations.dataLabel' => Rule::requiredIf(function () use ($request) {
        return ($request->assistanceRequest['requestType'] == "TECHNICAL_DATA" or $request->assistanceRequest['requestType'] == "REPAIR_METHOD" or $request->assistanceRequest['requestType'] == "WIRE_DIAGRAM") and $request->assistanceRequest['source'] == 'ATD'; //chiedere e modificare 5
    }),
    'requestInformations.cuCode' => Rule::requiredIf(function () use ($request) {
        return ($request->assistanceRequest['requestType'] == "TECHNICAL_DATA" or $request->assistanceRequest['requestType'] == "REPAIR_METHOD" or $request->assistanceRequest['requestType'] == "WIRE_DIAGRAM") and $request->assistanceRequest['source'] == 'ATD'; //chiedere e modificare 5
    }),
    'requestInformations.text' => 'required',
    'requestInformations.errorCodes' => Rule::requiredIf(function () use ($request) {
        return $request->assistanceRequest['requestType'] == "BREAKDOWN" or $request->assistanceRequest['requestType'] == "ERROR_CODE";
    }),
    'requestInformations.troubles' => Rule::requiredIf(function () use ($request) {
        return $request->assistanceRequest['requestType'] == "BREAKDOWN" or $request->assistanceRequest['requestType'] == "ERROR_CODE";
    }),
    'requestInformations.controls' => Rule::requiredIf(function () use ($request) {
        return $request->assistanceRequest['requestType'] == "BREAKDOWN" or $request->assistanceRequest['requestType'] == "ERROR_CODE";
    }),
); 

$validator = Validator::make( $request->all(), $rules);

可以帮忙吗？解决这个问题的方法简单吗？

【问题讨论】：

标签： laravel validation

【解决方案1】：

在您的 Rule::requiredIf(function (){}) 规则中，您使用了$request->assistanceRequest['source'] 变量并且错误显示source 键不存在于$request->assistanceRequest 数组中。

方案一：使用??操作符：

...
    'vehicle.bodyLabel' => Rule::requiredIf(function () use ($request) {
        return $request->assistanceRequest['source'] ?? null == "ATD"; //example problem
    }),
...

方案二：使用isset()函数：

...
    'vehicle.bodyLabel' => Rule::requiredIf(function () use ($request) {
        if(!isset($request->assistanceRequest['source'])) return false;
        return $request->assistanceRequest['source'] ?? null == "ATD"; //example problem
    }),
...

解决方案 3：使用 request() 助手：

...
    'vehicle.bodyLabel' => Rule::requiredIf(function () use ($request) {
        return request('assistanceRequest.source', null) == "ATD"; //example problem
    }),
...

请注意，您已在多个验证规则中使用它，您必须更改所有规则

【讨论】：