Nested JSON Validation in Laravel / Lumen

我们可能会提交这样一个请求，一个 嵌套的 JSON 对象，那么如何对 JSON 对象的那边元素进行验证呢？

### Save Post Comments
POST {{API_BASE_URL}}/module/v1/posts/2/comments
Content-Type: application/json
Accept: application/json
Authorization: Bearer {{TOKEN}}

 {
   "data": [
      {
          "media_ids": [1,2,3],
          "title": "Title A",
          "status": "A",
          "comment": "Objectively seize progressive ROI before unique bandwidth."
      },
      {
          "media_ids": [4,5,6],
          "title": "Title B",
          "status": "B",
          "comment": "Objectively mesh sticky value for global data. "
      }
   ]
 }

方法是：

    $data = $this->validate($request, [
        'data' => ['required', 'array'],
        'data.*.media_ids' => ['array'],
        'data.*.title' => ['required', 'string'],
        'data.*.status' => ['required', Rule::in(['A', 'B', 'C', 'D'])],
        'data.*.comment' => ['nullable', 'string']
    ]);

    print_r($data);