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HomeBackend DevelopmentPHP TutorialLaravel 五 基础(十一)- 表单验证

Laravel 5 基础(十一)- 表单验证

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

<code>php artisan make:request CreateArticleRequest</code>

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:

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

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:

<code>	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'		];	}</code>

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

<code>    @if ($errors->any())        <ul class="alert alert-danger">            @foreach($errors->all() as $error)                <li>{{ $error }}</li>            @endforeach        </ul>    @endif        {{--使用我们添加的 illuminate\html 开源库--}}    {!! Form::open([&#39;url&#39; => &#39;articles&#39;]) !!}</code>

修改控制器,引入我们的 Request 类。

<code>    public function store(Requests\CreateArticleRequest $request) {        Article::create($request->all());        return redirect(&#39;articles&#39;);    }</code>

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

<code>	&#39;locale&#39; => &#39;zh&#39;,</code>

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:

<code>	"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。",</code>

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:

<code>	 //注意 Request 的命名空间,不要弄错了    public function store(\Illuminate\Http\Request $request) {        $this->validate($request, [            &#39;title&#39; => &#39;required|min:3&#39;,            &#39;body&#39; => &#39;required&#39;,            &#39;published_at&#39; => &#39;required|date&#39;        ]);        Article::create($request->all());        return redirect(&#39;articles&#39;);    }</code>

结果相同,这样可以更快速的完成简单的验证。

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