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Homephp教程php手册Laravel 5框架学习之表单验证

Laravel 通过 Validation 类让您可以简单、方便的验证数据正确性及查看相应的验证错误信息。如果是更复杂的验证场景,你可能需要创建一个表单请求。表单请求是一

在建立一个文章的时候,如果你什么都不输入直接提交,ok,你获得了一个空的文章,没有任何错误提示,这是不对的。在命令行下运行 php artisan 可以看到一个选项 make:request,新建一个form request类。在命令行执行

复制代码 代码如下:


php artisan make:request CreateArticleRequest

生成的文件在 app/http/requests 目录下。在文件中我们可以看到两个方法:

public function authorize() { return false; } public function rules() { return [ // ]; }

authorize 表示用户在提交表单的时候是否需要是认证用户,我们不需要认证,返回 true。rules是我们的规则方法。让我们修改这个方法:

public function authorize() { //修改为 true,表示不需要认证,或者是通过认证 return true; } public function rules() { return [ 'title' => 'required|min:3', 'body' => 'required', 'published_at' => 'required|date' ]; }

其他的约束可以插看 laravel 的文档。上面的约束表示 title 是必须输入的,最少3个字符,body 是必须的,published_at 是必须的而且是日期。

在视图中,我们总是可以访问 $errors 变量来判断我们是否有错误,修改视图

@if ($errors->any())

    @foreach($errors->all() as $error)
  • {{ $error }}
  • @endforeach
@endif {{--使用我们添加的 illuminate\html 开源库--}} {!! Form::open(['url' => 'articles']) !!}

修改控制器,引入我们的 Request 类。

public function store(Requests\CreateArticleRequest $request) { Article::create($request->all()); return redirect('articles'); }

再次提交表单,什么都不填,可以看到错误信息。

修改提示信息变为中文

显示的是英文的错误信息,,实际上laravel考虑到了国际化的问题,首先修改 config/app.php ,

复制代码 代码如下:


 'locale' => 'zh',

将 locale 语言设置为中文,然后再 resources/lang 下面新建文件夹 zh, 拷贝 resources/lang/en/validation.php 文件到 zh 目录下,修改:

"min" => [ "numeric" => "The :attribute must be at least :min.", "file" => "The :attribute must be at least :min kilobytes.", "string" => ":attribute 至少要包含 :min 字符。", "array" => "The :attribute must have at least :min items.", ], "required" => ":attribute 必须填写。",

其他的可以自行翻译。再次提交空表单,错误信息为中文了。而且 min:3 的判断也为最少3个中文。

--

laravel 也在控制器中集成了 validate 方法,换句话说,我们不一定要生成 request 类,这些工作我们可以直接在控制器中完成。

修改控制器:

//注意 Request 的命名空间,不要弄错了 public function store(\Illuminate\Http\Request $request) { $this->validate($request, [ 'title' => 'required|min:3', 'body' => 'required', 'published_at' => 'required|date' ]); Article::create($request->all()); return redirect('articles'); }

结果相同,这样可以更快速的完成简单的验证。

以上所述就是本文给大家分享的全部内容了,希望能够对大家熟练掌握Laravel5框架有所帮助。

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