Laravel5.1 表单验证

时间 2019-11-12

原文原文链接

当咱们提交表单时一般会对提交过来的数据进行一些验证、Laravel在Controller类中使用了一个traint：ValidatesRequest。方便咱们在控制器中使用验证器。php

下面咱们就来看一个验证表单的例子。css

1 准备

1.1 建立路由

Route::resource('/post', 'PostController');

1.2 建立控制器

php artisan make:controller PostController

1.3 建立视图

在 /views 中建立 /post/create.blade.php 文件，编写以下：html

<!DOCTYPE html>
<html>
<head>
    <link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css">
</head>
<body>
<div class="container">
    <div class="row">
        <div class="col-md-8 col-md-offset-2">
            <div class="panel panel-default">
                <div class="panel-heading">
                    建立文章
                </div>
                <div class="panel-body">
                    <form action="{{ url("/post") }}" method="POST" class="form-horizontal">
                        <input type="hidden" name="_token" value="{{ csrf_token() }}">
                        <div class="form-group">
                            <label class="col-md-4 control-label">标题</label>
                            <div class="col-md-6">
                                <input type="text" class="form-control" name="title">
                            </div>
                        </div>

                        <div class="form-group">
                            <label class="col-md-4 control-label">内容</label>
                            <div class="col-md-6">
                                <textarea rows="10" class="form-control" name="content"></textarea>
                            </div>
                        </div>

                        <div class="form-group">
                            <div class="col-md-6 col-md-offset-4">
                                <button class="btn btn-primary" type="submit">Submit</button>
                            </div>
                        </div>
                    </form>
                </div>
            </div>
        </div>
    </div>
</div>
</body>
</html>

1.4 在PostController中返回create视图

    public function create()
    {
        return view('post.create');
    }

2 开始验证

2.1 validate

咱们在store方法中验证表单提交过来的数据，语法是这样的：bootstrap

validate() 参数：数组

request：传入请求就好。
rule：规则数组，把咱们的验证逻辑写在这里面。

    public function store(Request $request)
    {
        $this->validate($request, [
            'title' => 'required|min:3',
            'content' => 'required|min:10',
        ]);
        echo '验证经过';
    }

↑ 上面的例子若是验证经过则显示"验证经过" 若是验证没有经过的话Laravel会自动跳转到表单提交页面并把错误信息闪存到Session中，咱们能够修改create.balde.php文件添加显示错误代码post

2.2 显示错误信息

<!DOCTYPE html>
<html>
<head>
    <link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css">
</head>
<body>
<div class="container">
    <div class="row">
        <div class="col-md-8 col-md-offset-2">
            <div class="panel panel-default">
                <div class="panel-heading">
                    建立文章
                </div>
                <div class="panel-body">
                    @if (count($errors) > 0)
                        <div class="alert alert-danger">
                            <ul>
                                @foreach ($errors->all() as $error)
                                    <li>{{ $error }}</li>
                                @endforeach
                            </ul>
                        </div>
                    @endif
                    <form action="{{ url("/post") }}" method="POST" class="form-horizontal">
                        <input type="hidden" name="_token" value="{{ csrf_token() }}">
                        <div class="form-group">
                            <label class="col-md-4 control-label">标题</label>
                            <div class="col-md-6">
                                <input type="text" class="form-control" name="title">
                            </div>
                        </div>

                        <div class="form-group">
                            <label class="col-md-4 control-label">内容</label>
                            <div class="col-md-6">
                                <textarea rows="10" class="form-control" name="content"></textarea>
                            </div>
                        </div>

                        <div class="form-group">
                            <div class="col-md-6 col-md-offset-4">
                                <button class="btn btn-primary" type="submit">Submit</button>
                            </div>
                        </div>
                    </form>
                </div>
            </div>
        </div>
    </div>
</div>
</body>
</html>

3 手动建立Validator

    public function store(Request $request)
    {
//        $this->validate($request, [
//            'title' => 'required|min:3',
//            'content' => 'required|min:10',
//        ]);
        $validator = Validator::make($request->all(), [
            'title' => 'required|min:3',
            'content' => 'required|min:10',
        ]);
        if ($validator->fails()) {
            return redirect('post/create')
                ->withErrors($validator)
                ->withInput();
        }
        echo '验证经过';
    }