Laravel 6 API请求在保存之前验证对象数组

Question

问题：如何正确验证通过 API 请求发送的 JSON 对象数组？

情况：

我发送了一个要保存的 JSON 对象数组的发布请求。但是，我无法进行验证。

JSON

{
    "answers": [
        {
            "title": "hello World",
            "question_id": "1"
        },
        {
            "title": "hello World 2",
            "question_id": "2"
        }
    ]
}

尝试 #1

Route::post('answer/multiple', function (Request $request) {
    $answers = $request->answers;
    foreach ($answers as $answer) {
        $answer->validate([
            'title' => 'required',
            'question_id' => 'required',
        ]);
        $new_answer = new Answer();
        $new_answer->title = $answer['title'];
        $new_answer->question_id = $answer['question_id'];
        $new_answer->save();
    }
    return response()->json($request);
});

我也试过循环遍历每一个来验证，遗憾的是它不起作用。

尝试 #2

Route::post('answer/multiple', function (Request $request) {
    $validator = Validator::make($request->all(), [
        'answer.*.title' => 'required',
        'answer.*.question_id' => 'required',
    ]);
    $answers = $request->answers;
    foreach ($answers as $answer) {
        $new_answer = new Answer();
        $new_answer->title = $answer['title'];
        $new_answer->question_id = $answer['question_id'];
        $new_answer->save();
    }
    return response()->json($request);
});

在这一项中，验证被忽略。

Answer 1

与$this->validate() 控制器方法不同，Validator::make() 静态函数在验证失败时不会抛出错误。

您需要检查它是否失败并使用->fails() Validator 方法返回错误消息：

$validator = Validator::make($request->all(), [
    'answer.*.title' => 'required',
    'answer.*.question_id' => 'required',
]);

if ($validator->fails()) { 
    return redirect('post/create')
        ->withErrors($validator)
        ->withInput();
}

foreach ($request->answers as $answer) {
    $new_answer = new Answer();
    $new_answer->title = $answer['title'];
    $new_answer->question_id = $answer['question_id'];
    $new_answer->save();
}

return response()->json($request);

或者，您可以使用$this->validate() 方法：

$validatedData = $this->validate($request, [
    'answer.*.title' => 'required',
    'answer.*.question_id' => 'required',
]);

请注意，我们使用$request 而不是$request->all()。

另外请注意，使用此方法时，您将在$validatedData 中获得一系列答案，因此您需要相应地更改您的代码。

Answer 2

$answer = [ 'answer' => $requests->all() ];


$validator = Validator::make($answer, [
       'answer.*.title' => 'required|string',
       'answer.*.question_id' => 'required|integer'
    ]);