public function edit($id) {
    $article = Article::findOrFail($id);

    return view('articles.edit', compact('article'));
  }

@extends('layout')

@section('content')
  <h1>Edit: {!! $article->title !!} </h1>

  <hr/>

  ...

  public function update($id, \Illuminate\Http\Request $request) {
    $article = Article::findOrFail($id);
    $article->update($request->all());

    return redirect('articles');
  }

  public function update($id, Requests\ArticleRequest $request) {
    $article = Article::findOrFail($id);
    $article->update($request->all());

    return redirect('articles');
  }

@if ($errors->any())
  <ul class="alert alert-danger">
    @foreach($errors->all() as $error)
      <li>{{ $error }}</li>
    @endforeach
  </ul>
@endif

<div class="form-group">
  {!! Form::label('title', 'Title:') !!}
  {!! Form::text('title', null, ['class' => 'form-control']) !!}
</div>

<div class="form-group">
  {!! Form::label('body', 'Body:') !!}
  {!! Form::textarea('body', null, ['class' => 'form-control']) !!}
</div>

<div class="form-group">
  {!! Form::label('published_at', 'Publish On:') !!}
  {!! Form::input('date', 'published_at', date('Y-m-d'), ['class' => 'form-control']) !!}
</div>

<div class="form-group">
  {{--这里要设置变量，依据是编辑还是修改来改变，当然也可以不放置在partial中--}}
  {!! Form::submit($submitButtonText, ['class' => 'btn btn-primary form-control']) !!}
</div>

@extends('layout')

@section('content')
  <h1>Write a New Article</h1>

  <hr/>

  @include('articles.list')

  {{--使用我们添加的 illuminate\html 开源库--}}
  {!! Form::open(['url' => 'articles']) !!}
    @include('articles.form_partial', ['submitButtonText' => 'Add Article'])
  {!! Form::close() !!}

@stop

@extends('layout')

@section('content')
  <h1>Edit: {!! $article->title !!} </h1>

  <hr/>

  @include('articles.list')
  {{--使用我们添加的 illuminate\html 开源库--}}
  {!! Form::model($article, ['method' => 'PATCH', 'url' => 'articles/' . $article->id]) !!}
  @include('articles.form_partial', ['submitButtonText' => 'Update Article'])

  {!! Form::close() !!}

@stop