5.10 添加数据验证

在 app/controllers/ArticlesController.php 文件中，修改 ArticlesController 控制器 store 动作：

    public function store()
    {
        $rules = array("title" => "required|min:5");

        $validator = Validator::make(Input::all(), $rules);

        if ($validator->fails())
        {
            return Redirect::route("articles.create")
                ->withErrors($validator)
                ->withInput();
        }

        $article = Article::create(array("title"=>Input::get("title"), "text"=>Input::get("text")));

        return Redirect::route("articles.show", array($article->id));
    }

然后修改 app/views/articles/create.blade.php 添加 ：

@if ($errors->any())
<div id="error_explanation">
    <h2>{{ count($errors->all()) }} prohibited
      this article from being saved:</h2>
    <ul>
    @foreach ($errors->all() as $message)
      <li>{{ $message }}</li>
    @endforeach
    </ul>
  </div>
@endif

再次访问 http://localhost:8000/articles/create ，尝试发布一篇没有标题的文章，会看到一个很有用的错误提示。