流明验证不会指定哪些字段失败

Question

我正在尝试在我的 Lumen API 中包含验证，但是当验证失败时，我在响应方面遇到了一些困难：

BooksController.php

  public function store(Request $request)
  {
    $this->validateBook($request);

    $book = Book::create($request->all());
    $data = $this->item($book, new BookTransformer());

    return response()->json($data, 201, [
      'Location' => route('books.show', ['id' => $book->id]),
    ]);
  }

  private function validateBook(Request $request)
  {
    $this->validate($request, [
      'title'       => 'required|max:255',
      'description' => 'required',
      'author_id'   => 'required|exists:authors,id',
    ], [
      'description.required' => 'Please fill out the description.',
    ]);
  }

我修改了我的处理程序以检查 ValidationException 的实例，但无论出于何种原因，我的响应始终相同...

Handler.php

  public function render($request, Exception $e)
  {
    if ($request->wantsJson()) {
      $response = [
        'message' => (string) $e->getMessage(),
        'status'  => 400,
      ];

      if ($e instanceof HttpException) {
        $response['message'] = Response::$statusTexts[$e->getStatusCode()];
        $response['status']  = $e->getStatusCode();
      } else if ($e instanceof ModelNotFoundException) {
        $response['message'] = Response::$statusTexts[Response::HTTP_NOT_FOUND];
        $response['status']  = Response::HTTP_NOT_FOUND;
      } else if ($e instanceof ValidationException) {

        // [BUG] Shouldn't this display the fields that have failed?
        $response['message'] = 'how do I display what fields failed?'; 
        $response['status']  = Response::HTTP_UNPROCESSABLE_ENTITY;        

      }

      if ($this->isDebugMode()) {
        $response['debug'] = [
          'exception' => get_class($e),
          'trace'     => $e->getTrace(),
        ];
      }

      return response()->json(['error' => $response], $response['status']);
    }

    return parent::render($request, $e);

  }

如果我删除检查 an 而不是 ValidationException 的代码块，我的响应总是相同的：

{
  "error": {
    "message": "The given data failed to pass validation.",
    "status": 400
  }
}

然而，这对于客户端的任何试图与 API 交互的人来说将是一场噩梦，因为它没有指定任何有关哪些字段失败的信息，也不包含我的自定义错误消息.

我期待的是：

{
  "error": {
    "message": "The given data failed to pass validation.",
    "errors": {
         "title": "The title is required.",
         "description": "Please fill out the description."
     },
    "status": 422
  }
}

我做错了什么？我怎样才能做到这一点？

Answer 1

事实证明，我需要让父处理程序处理错误响应，而不是检查 ValidationException 实例并返回我自己的自定义响应。修改后的代码如下：

Handler.php

  public function render($request, Exception $e)
  {
    if ($request->wantsJson() && !($e instanceof ValidationException)) {
      $response = [
        'message' => (string) $e->getMessage(),
        'status'  => 400,
      ];

      if ($e instanceof HttpException) {
        $response['message'] = Response::$statusTexts[$e->getStatusCode()];
        $response['status']  = $e->getStatusCode();
      } else if ($e instanceof ModelNotFoundException) {
        $response['message'] = Response::$statusTexts[Response::HTTP_NOT_FOUND];
        $response['status']  = Response::HTTP_NOT_FOUND;
      }

      if ($this->isDebugMode()) {
        $response['debug'] = [
          'exception' => get_class($e),
          'trace'     => $e->getTrace(),
        ];
      }

      return response()->json(['error' => $response], $response['status']);
    }

    return parent::render($request, $e);
  }

Answer 2

如果只想获取验证字段错误，可以从getResponse方法的内容中获取。结果是一个 json 字符串，所以你需要 json_decode it

public function render($request, exception $e)
{
    $rendered = parent::render($request, $e);
    $statusCode = $rendered->getstatuscode();
    $errorResponse = [
        'error' => true,
        'code' => $statusCode,
        'message' => $e->getmessage(),
    ];
    if ($e instanceof ValidationException) {
        $errorResponse['message'] = json_decode($e->getResponse()->content());
    }
    return response()->json($errorResponse, $statusCode);
}

流明验证不会指定哪些字段失败

Lumen validation will not specify what fields have failed

php

api

laravel

lumen