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表单数组输入验证功能实现


Laravel 5.2 新增表单数组输入验证,听起来很懵?下面我们以一个具体例子来演示这一功能。

首先在routes.php定义相应路由:

Route::get('form','TestController@form');
Route::post('form/validate','TestController@validate');

然后使用Artisan命令创建对应控制器:

php artisan make:controller TestController

编辑生成的TestController.php文件内容如下:

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;

use App\Http\Requests;
use App\Http\Controllers\Controller;

class TestController extends Controller
{
    public function form()
    {
        return view('test.form');
    }

    public function validate(Requests\FormRequest $request)
    {
        return 'success';
    }
}

接下来创建表单视图文件resources/views/test/form.blade.php,编辑form.blade.php文件内容如下:

@extends('layouts.app')

@section('content')
    <div class="container">
        <div class="row">
            @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('form/validate')}}" method="POST">
                {!! csrf_field() !!}
                <label>Company Name</label>
                <input type="text" name="name">

                <h3>Employees</h3>
                <div class="add-employee">
                    <label>Employee Name</label>
                    <input type="text" name="employee[1][name]">
                    <label>Employee Title</label>
                    <input type="text" name="employee[1][title]">
                </div>
                <div class="add-employee">
                    <label>Employee Name</label>
                    <input type="text" name="employee[2][name]">
                    <label>Employee Title</label>
                    <input type="text" name="employee[2][title]">
                </div>

                <input type="submit">
            </form>
        </div>
    </div>
@endsection

我们在表单中定义了数组输入字段employee[][name]employee[][title],以便同时输入多个员工姓名和职位。

此外,注意到我们在控制器TestControllervalidate方法中注入了FormRequest请求类,我们将在这个类中实现表单输入验证逻辑,下面我们使用Artisan命令生成这个请求类:

php artisan make:request FormRequest

这样会在app/Http/Requests目录下生成FormRequest.php,编辑该文件内容如下:

<?php

namespace App\Http\Requests;

use App\Http\Requests\Request;

class FormRequest extends Request
{
    /**
     * Determine if the user is authorized to make this request.
     *
     * @return bool
     */
    public function authorize()
    {
        return true;
    }

    /**
     * Get the validation rules that apply to the request.
     *
     * @return array
     */
    public function rules()
    {
        return [
            'name'=>'required|max:100',
            'employee.*.name'=>'required|max:100',
            'employee.*.title'=>'required|max:100'
        ];
    }
}

至此,我们已经完成代码编写工作,下面我们来测试数组输入验证,在浏览器中访问http://laravel.app/form,页面显示如下:

Laravel表单数组输入验证

我们接下来输入一些表单数据:

Laravel表单数组输入验证

最后,点击“提交”按钮,显示验证错误提示信息:

Laravel表单数组输入验证