Laravel $ request不包含一些输入数组表单字段

Question

我在laravel 5.4中有一个表格，允许人们创建问卷 - 动态添加问题字段（这在js的其他地方处理）。

<form method="POST" action="/questions" enctype="multipart/form-data">

    {{ csrf_field() }}

    <div class="form-group">
        <label for="featured-img">Featured Image</label>
        <input type="file" accept="image/*" class="featured-image image-uploader" id="featured-img" name="featured_img" />
        <img src="" class="image-preview" alt="uploaded image preview" />
    </div>

    <div class="form-group">
        <label for="title">Title</label>
        <input name="title" type="text" class="form-control" id="title" placeholder="Title" required>
    </div>

    <div class="form-group">
        <label for="description">Description</label>
        <input name="description" type="text" class="form-control" id="description" placeholder="Description" required>
    </div>

    <div class="form-control">
        <label for="skill_level">Skill Level</label>
        <select name="skill_level" class="custom-select" id="skill_level" required>
            <option value="kids">Kids</option>
            <option value="beginner">Beginner</option>
            <option value="intermediate">Intermediate</option>
            <option value="advanced">Advanced</option>
        </select>
    </div>

    <div class="add-contributor-container">
        <button id="add-contributor">Add contributor</button>
    </div>

    <div id="contributor-section">

        <div class="form-group contributors">
            <label for="contributors-1">Contributor 1</label>
            <input name="contributors[1]" class="form-control contributor-name" id="contributors-1" required />
            <input name="contributors_amount[1]" class="form-control contributor-amount" id="contributors-amount-1" required />
            <button type="button" class="remove-contributor">Remove Contributor</button>
        </div>

    </div>

    <div class="form-group">
        <label for="category">Category</label>
        <select name="category_id" class="form-control" id="category" required>
            @foreach($categories as $category)
                <option value="{{ $category->id }}">{{ $category->title }}</option>
            @endforeach
        </select>
    </div>

    <div class="add-question-container">
        <button type="button" id="add-question">Add question</button>
    </div>

    <div id="question-section">

        <div class="form-group question">
            <label for="questions-1">Question 1</label>
            <textarea name="questions[1]" class="form-control question-content" id="questions-1" rows="3" required></textarea>
            <input type="file" accept="image/*" class="questions-image image-uploader" name="questions_img[1]" />
            <img src="" class="image-preview" alt="uploaded image preview" />
            <button type="button" class="remove-question">Remove Question</button>
        </div>

    </div>

    <div class="form-group">
        <label for="published">Publish</label>
        <p>If unticked, only you will be able to see this project. You can edit this later.</p>
        <input name="published" type="checkbox" class="form-control" id="published" value="1" checked="checked">
    </div>

    <input type="hidden" value="1" name="order" />

    <div class="form-group">

        <button type="submit" class="btn btn-primary">Submit</button>

    </div>

</form>

当我在我的控制器中检索请求时，它包含我的所有表单数据（包括贡献者数组，所以我假设我的输入数组语法是正确的）但缺少questions_img数组。

对于为什么只有这个字段不会被发送，我有什么遗漏？ 以下是我在控制器中检查请求的方法：

public function store( StoreProject $request )
{ 
   dd( $request ); 
}

而StoreProject是我创建的FormRequest（可能是主要罪魁祸首）：

namespace App\Http\Requests;

使用Illuminate \ Foundation \ Http \ FormRequest;

类StoreProject扩展了FormRequest {     / **      *确定用户是否有权提出此请求。      *      * @return bool      * /     公共职能授权（）     {         返回true;     }

/**
 * Get the validation rules that apply to the request.
 *
 * @return array
 */
public function rules()
{

    $rules = [

        'title' => 'required',

        'category_id' => 'required',

        'description' => 'required',

        'order' => 'required',

        'featured_img' => 'image',

        'skill_level' => 'required|string'

    ];

    foreach( $this->request->get( 'questions_img' ) as $key => $val )
    {

        $rules['questions_img.'.$key] = 'image';

    }

    return $rules;

}

}

总结一下：如果我在商店功能中使用正常的请求而不是 StoreProject ，并调用 $ request-＆gt; all（ ）该字段正确传递。如果我使用自定义表单请求，有没有理由为$ request缺少字段？