Php 拉威尔5.4图像库

我正在构建一个Laravel web应用程序，其中我需要一个动态图像库，我构建了一个后端管理面板，可以在其中添加图像，我成功地将图像添加并保存到数据库中，但我无法编辑或删除它们

错误是：

UrlGenerationException.php第17行中的ErrorException:Route:galleries.update][URI: 后端/库/{gallery}]。（视图：/var/www/html/tryout101/resources/views/backend/gallery/edit.blade.php）

这是我的路线代码：

<?php
   /*backend access*/
     Route::group(['prefix' => '/backend'], function() {
     /*The route Dashboard main page */
     Route::get('/' , 'AdminController@index')->name('dashboard');
     Route::resource('galleries' , 'GalleriesController');

     });

      <?php

        namespace App\Http\Controllers;
        use App\Gallery;
        use Illuminate\Http\Request;
        use Image; 
        use Illuminate\Support\Facades\Input;

      class GalleriesController extends Controller
    {
/**
 * Display a listing of the resource.
 *
 * @return \Illuminate\Http\Response
 */
public function index()
{
  $gallery = Gallery::all();
return view('backend.gallery.library', compact('gallery'));
}

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

/**
 * Store a newly created resource in storage.
 *
 * @param  \Illuminate\Http\Request  $request
 * @return \Illuminate\Http\Response
 */
public function store(Request $request)
{
  $gallery = new Gallery();
  $this->validate($request, [
    'title' => 'required',
    'image' => 'required'
  ]);

  $gallery->title = $request->title;
  $gallery->description = $request->description;
  if($request->hasFile('image')) {
    $file = Input::file('image');
    $filename = time(). '-' .$file->getClientOriginalName();
    $gallery->image = $filename;
    $file->move(public_path().'/images/', $filename);
  }
  $gallery->save();
  return $this->create()->with('success', 'Image Uploaded 
  Successfully');
}

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

/**
 * Show the form for editing the specified resource.
 *
 * @param  \App\Gallery  $gallery
 * @return \Illuminate\Http\Response
 */
public function edit(Gallery $gallery)
{
    if(!$gallery){
      return redirect('dashboard')->with(['fail'=>'post not found']);
    }
    return view('backend.gallery.edit',compact('gallery'));
}

public function update(Request $request, Gallery $gallery)
{
        $this->validate($request, [
        'title'=>'required|max:120',
        'image'=>'required|image|mimes:jpeg,png,jpg,gif,svg|max:2048'
       ]);

       $gallery->title = $request->title;
       $gallery->description = $request->description;
         if($request->hasFile('image')) {
         $file = Input::file('image');
         $filename = $file->getClientOriginalName();
         $gallery->image = $filename;
         $file->move(public_path().'images/', $filename);
       }
       $gallery->update();
      return Redirect()->route('dashboard')->with(['success'=> 'post 
      successfully updated']);
   }

    public function destroy(Gallery $gallery)
   {
    //
    }
 }

---

事实上，“galleries.update”路由需要一个Gallery

因此，在使用该路由调用route函数时，您应该告诉他您要去哪个库

因此，我认为

route('galleries.update')

进入

一切都会好起来的
非常感谢。
route('galleries.update')

route('galleries.update', $gallery)