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();

    }

@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