Laravel 文件上传 |从 MySQL 数据库中获取文件以在 laravel 中查看

Question

我现在不知道如何从 laravel 显示我的文件。数据库包含文件的路径，现在我需要获取我的文件并在 laravel 中显示它们。

files.blade.php

@extends('dashboard.layouts.dashboard-layout')
@push('css')



@endpush



@section('content')

<div class="d-flex vw-100 vh-100 justify-content-center align-items-center">
<img src="storage/{{$savedfile->filename}}" alt="">
</div>

 <div class="d-flex vw-100 vh-100 justify-content-center align-items-center">
        <form method="POST" enctype="multipart/form-data" action="{{route('dashboard.files')}}">
            @csrf
                <div class="form-group">
                  <label for="exampleFormControlFile1">Example file input</label>
                  <input type="file" class="form-control-file" name="uploadedfile" id="exampleFormControlFile1">
                </div>
                <div class="form-group"><button class="btn btn-success">Upload the file</button></div>
              </form>
        </div>

@endsection

@push('script')

@endpush

<img src="storage/{{$savedfile->filename}}" alt="" /> 是需要显示的文件

文件上传控制器

<?php

namespace App\Http\Controllers;

use App\Models\Fileupload;
use Illuminate\Http\Request;

class FileuploadController extends Controller
{
    /**
     * Display a listing of the resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function index()
    {
        //
    }

    /**
     * Show the form for creating a new resource.
     *
     * @return \Illuminate\Http\Response
     */
    public function create()
    {
        //
    }

    /**
     * Store a newly created resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return \Illuminate\Http\Response
     */
    public function files(Request $request)
    {
        $file = $request->file('uploadedfile');
        $filename = $file->getClientOriginalName();
        $filename = time(). '.' .$filename;
    
        $path = $file->storeAs('public/docs', $filename);
    
        Fileupload::create(['filename' => $path]);

        return view('dashboard.files')->with('savedfile', $savedfile);

    }

    /**
     * Display the specified resource.
     *
     * @param  \App\Models\Fileupload  $fileupload
     * @return \Illuminate\Http\Response
     */
    public function show(Fileupload $fileupload)
    {
        //
    }

    /**
     * Show the form for editing the specified resource.
     *
     * @param  \App\Models\Fileupload  $fileupload
     * @return \Illuminate\Http\Response
     */
    public function edit(Fileupload $fileupload)
    {
        //
    }

    /**
     * Update the specified resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \App\Models\Fileupload  $fileupload
     * @return \Illuminate\Http\Response
     */
    public function update(Request $request, Fileupload $fileupload)
    {
        //
    }

    /**
     * Remove the specified resource from storage.
     *
     * @param  \App\Models\Fileupload  $fileupload
     * @return \Illuminate\Http\Response
     */
    public function destroy(Fileupload $fileupload)
    {
        //
    }
}

这是发布和返回文件的控制器。 return view('dashboard.files')->with('savedfile', $savedfile) 是返回和查看我的文件的代码。

不过……

这是我遇到的错误

Error Image

我不知道为什么，但它已经强调了

Answer 1

错误很明显。$savedFile 未定义。所以你可以像下面这样更改它

public function files(Request $request)
    {
        $file = $request->file('uploadedfile');
        $filename = $file->getClientOriginalName();
        $filename = time(). '.' .$filename;
    
       $file->storeAs('public/docs', $filename);
    
        Fileupload::create(['filename' => $path]);

         $path ="docs/".$filename;
      
        return view('dashboard.files')->with('savedfile', $path);

    }

或

public function files(Request $request)
        {
            $file = $request->file('uploadedfile');
            $filename = $file->getClientOriginalName();
            $filename = time(). '.' .$filename;
        
           $file->storeAs('public/docs', $filename);
        
            Fileupload::create(['filename' => $path]);
    
          
         $path = \Illuminate\Support\Facades\Storage::url("docs/".$filename)
            return view('dashboard.files')->with('savedfile', $path);
    
        }

在你看来是这样

<img src="{{asset($savedfile)}}" />

更新 更好的方法是为文档创建单独的文件系统，如下所示

在config/filesystem.php

 'docs' => [
            'driver' => 'local',
            'root' => storage_path('app/public/docs'),
            'url' => env('APP_URL').'/storage/docs',
            'visibility' => 'public',
        ],

在你的控制器中

$path=Storage::disk('docs')->url($filename);

所以在你的刀片文件中

<img src="{{$savedfile}}" />