Laravel编辑产品-CRUD之edit和update

　　上一篇讲了Laravel展示产品-CRUD之show，现在我们说一下Laravel编辑产品，涉及到编辑和更新，

　　1,定义controller，update和create有点相似，我们复制一份过来修改。new item改为item::find

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public function edit($id)     {         //         $item = Item::find($id);         return view('items.edit')->with('item', $item);       }     public function update(Request $request, $id)     {         $validatedData = $request->validate([             'name' => 'required|max:255',             'price' => 'required|numeric',             'img' => 'required|max:255',             'description' => 'required|max:255',         ]);//检查输入是否合法         $item = Item::find($id);           $item->name = $request->name;         $item->price = $request->price;         $item->img = $request->img;         $item->description = $request->description;           $item->save();     }

　　2,编辑edit.blade.php，文件在/resources/views/items/edit.blade.php，添加如下代码，注意method是PUT

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@extends('layouts.app')   @if ($errors->any())     <div class="alert alert-danger">         <strong>Errors:</strong>         <ul>             @foreach ($errors->all() as $error)                 <li>{{ $error }}</li>             @endforeach         </ul>     </div> @endif   @section('content')     <div class="container">         <div class="row">             <div class="col-md-8 col-md-offset-2">                 <div class="card card-default">                     <div class="card-header">Edit Item</div>                     <div class="card-body">                         <form method="POST" action="{{route('items.update', $item->id)}}" aria-label="Register">                             @csrf                             <input type="hidden" name="_method" value="PUT">                             <div class="form-group row">                                 <label for="name" class="col-md-4 col-form-label text-md-right">Name</label>                                 <div class="col-md-6">                                     <input id="name" type="text" name="name" value="{{ $item->name }}" required="required" autofocus="autofocus" class="form-control">                                 </div>                             </div>                             <div class="form-group row">                                 <label for="email" class="col-md-4 col-form-label text-md-right">Price</label>                                 <div class="col-md-6">                                     <input id="email" type="text" name="price" value="{{ $item->price }}" required="required" class="form-control">                                 </div>                             </div>                             <div class="form-group row">                                 <label for="password" class="col-md-4 col-form-label text-md-right">Img</label>                                 <div class="col-md-6">                                     <input id="password" type="text" name="img" class="form-control" value="{{ $item->img }}">                                 </div>                             </div>                             <div class="form-group row">                                 <label for="password-confirm" class="col-md-4 col-form-label text-md-right">Description</label>                                 <div class="col-md-6">                                     <input id="password-confirm" type="text" name="description" required="required" class="form-control" value="{{ $item->description }}">                                 </div>                             </div>                             <div class="form-group row mb-0">                                 <div class="col-md-6 offset-md-4">                                     <button type="submit" class="btn btn-primary">Save</button>                                 </div>                             </div>                         </form>                     </div>                 </div>                </div>            </div>        </div>    @endsection