Laravel多文件上传：解决store()方法调用错误及最佳实践

<x-layout>
    @if (session('message'))
        <div class="alert alert-success">{{session('message')}}</div>
    @endif

    <div class="container vh-100">
        <div class="row h-100 w-100 align-items-center">
            <div class="offset-3 col-6">
                <form method="POST" action="{{route('transfer.submit')}}" class="card" enctype="multipart/form-data">
                    @csrf
                    <div class="border w-100" id="fileWrapper">
                        <div class="mb-3 w-100 h-100">
                            <!-- 关键：name="files[]" 和 multiple 属性 -->
                            <input type="file" class="form-control w-100 h-100 fileInput" id="fileupload" name="files[]" multiple>
                        </div>
                    </div>
                    <div class="mb-3">
                      <label for="recipient_mail" class="form-label">Invia file a </label>
                      <input type="email" class="form-control" id="recipient_mail" name="recipient_mail">
                    </div>
                    <div class="mb-3">
                        <label for="sender_mail" class="form-label">La tua mail</label>
                        <input type="email" class="form-control" id="sender_mail" name="sender_mail">
                      </div>
                    <div class="mb-3">
                      <label for="title" class="form-label">Titolo</label>
                      <input type="text" class="form-control" id="title" name="title">
                    </div>
                    <div class="mb-3">
                       <label for="message" class="form-label">Messaggio</label>
                       <textarea name="message" cols="50" rows="10"></textarea>
                      </div>
                    <button type="submit" class="btn btn-primary">Submit</button>
                </form>
            </div>
        </div>
    </div>
</x-layout>

use Illuminate\Http\Request;
use App\Models\Transfer; // 假设你的模型是Transfer
use App\Http\Requests\TransferRequest; // 假设你使用了表单请求进行验证

class TransferController extends Controller
{
    public function transferSubmit(TransferRequest $request)
    {
        $uploadedFilePaths = [];

        // 检查是否有文件上传，并迭代处理
        if ($request->hasFile('files')) { // 注意这里是 'files' 而不是 'files[]'
            foreach ($request->file('files') as $file) {
                // 确保 $file 是一个有效的 UploadedFile 实例
                if ($file->isValid()) {
                    // 将文件存储到 'public/files' 目录下，并获取存储路径
                    $path = $file->store('public/files');
                    $uploadedFilePaths[] = $path;
                }
            }
        }

        // 将文件路径数组存储到数据库
        // 如果数据库字段是字符串类型，通常会将其序列化为JSON字符串
        $transfer = Transfer::create([
            'sender_mail' => $request->input('sender_mail'),
            'recipient_mail' => $request->input('recipient_mail'),
            'title' => $request->input('title'),
            'message' => $request->input('message'),
            'files' => json_encode($uploadedFilePaths), // 将文件路径数组编码为JSON字符串存储
        ]);

        return redirect(route('home'))->with('message', 'File inviato con successo');
    }
}

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class Transfer extends Model
{
    use HasFactory;

    protected $fillable = [
        'recipient_mail',
        'sender_mail',
        'title',
        'message',
        'files', // 注意这里是 'files'，不再是 'files[]'
    ];

    // 如果你想在访问时自动将JSON字符串转换回数组，可以使用casts
    protected $casts = [
        'files' => 'array',
    ];
}

php artisan storage:link

php artisan make:request TransferRequest

<?php

namespace App\Http\Requests;

use Illuminate\Foundation\Http\FormRequest;

class TransferRequest extends FormRequest
{
    /**
     * Determine if the user is authorized to make this request.
     *
     * @return bool
     */
    public function authorize()
    {
        return true; // 根据你的业务逻辑设置授权
    }

    /**
     * Get the validation rules that apply to the request.
     *
     * @return array
     */
    public function rules()
    {
        return [
            'sender_mail' => 'required|email',
            'recipient_mail' => 'required|email',
            'title' => 'required|string|max:255',
            'message' => 'nullable|string',
            'files' => 'array|min:1', // 确保至少上传一个文件，并且是一个数组
            'files.*' => 'mimes:jpeg,png,pdf,zip|max:2048', // 对数组中的每个文件进行验证
            // files.* 表示对 'files' 数组中的每一个元素应用这些规则
            // mimes: 限制文件类型
            // max: 限制文件大小（KB）
        ];
    }

    /**
     * Get the error messages for the defined validation rules.
     *
     * @return array
     */
    public function messages()
    {
        return [
            'files.min' => '请至少上传一个文件。',
            'files.*.mimes' => '文件类型不合法，只允许上传JPEG, PNG, PDF, ZIP格式的文件。',
            'files.*.max' => '文件大小不能超过2MB。',
            // 其他字段的自定义消息
        ];
    }
}