1-3 laravel C R U D=(数据验证)

公共的模板布局和公共的页面一般放在common 里面，

<body>
@section('header')
    {{--头部--}}
@show
{{--中间内容区域--}}
<div class="container">
    <div class="row">
        {{--左侧布局--}}
        <div class="col-md-3"></div>


        {{--右侧内容区域--}}
        <div class="col-md-9">
            @yield('content')
        </div>
    </div>
</div>
{{--尾部--}}
@section('footer')
@show</body>

@extends('common.layouts')
@section('content')
    @include('common.message')
    <div class="panel panel-default">
       ......
    </div>
    @stop

1-1 R 查询

页面获取时处理 
 @foreach($students as $student)
                <tr>
                    <th scope="row">{{ $student->id }}</th>
                    <td>{{ $student->name }}</td>
                       .....
                </tr>
            @endforeach

model：

<?php

namespace App;

use IlluminateDatabaseEloquentModel;

class Student extends Model
{
    //
    protected $table = 'student';
    public $timestamps = true;
    public function getDateFormat(){
        return time();
    }
    protected function asDateTime($val)
    {
     return $val;
    }
}

Controller：

class StudentController extends Controller
{
    //学生列表
    public function index(){
//        $students = Student::get();
        $students = Student::paginate(2);

        return view('student.index', [
            'students'=>$students,
        ]);

    }
}

1-2增加

 public function create(Request $request)
    {
        return view('student.create');
    }

 <form class="form-horizontal" action="{{Route('student/save')}}" method="post">
                <input type="hidden" name="_token" value="{{ csrf_token() }}">
                 ...........

                <button type="submit" class="btn btn-primary">提交</button>
 </form>

Route::any('student/save', 'StudentController@save')->name('student/save');

public function save(Request $request)
    {

        $data = $request->input('Student');
        $student = new Student();
        $student->name = $data['name'];

        if ($student->save()) {
            return redirect('student/index');
        } else {
            return redirect()->back();
        }
    }

另一种增加方法（控制器中）

 public function create(Request $request)
    {
        if ($request->isMethod('POST')) {
            $data = $request->input('Student');
            if (Student::create($data)) {
                return redirect('student/index')->with('success', '添加成功');//
            } else {
                return redirect()->back();
            }
        }

        return view('student.create');
    }

1-2-1 添加提示（在控制器和野蛮操作）

 return redirect('student/index')->with('success', '添加成功');//

message页面设置：

{{--成功提示框--}}
@if(Session::get('success'))
..........
        <strong>成功</strong>操作成功提示{{Session::get('success')}}
    
@endif
{{--失败提示框--}}
@if(Session::has('error'))
   ................
        <strong>失败</strong>操作失败提示 {{Session::get('error')}}
    
@endif

1--2-2 数据验证（控制器验证）

 if ($request->isMethod('POST')) {
            $this->validate($request, [
               'Student.name'=> 'required|min:2|max:20',
                'Student.age'=> 'required|integer',
                'Student.sex'=>'required|integer',

            ]);
            $data = $request->input('Student');

这里我们要使用中间键组：（kermel.php）中=》=》=》=》错误信息分享到view ---》错误信息放在了session里面，通过

新建页面validator

@if(count($errors))
    <div class="alert alert-danger">
        <ul>
            {{--<li>姓名不能为空</li>--}}
            {{--<li>年龄只能为整数</li>--}}
            {{--<li>请选择性别</li>--}}
            @foreach($errors->all() as $error)
                <li>{{$error}}</li>
            @endforeach
        </ul>
    </div>
@endif

create页面插入此页面

@extends('common.layouts')
@section('content')
        @include('common.validator')
        <!-- 自定义内容区域 -->
<div class="panel panel-default">.
    <div class="panel-heading">新增学生</div>

定制错误提示：【

      $this->validate($request, [
                'Student.name' => 'required|min:2|max:20',
                'Student.age' => 'required|integer',
                'Student.sex' => 'required|integer',
            ], [
                'required' => ':attribute 为必填项',
            ], [
                'Student.name' => '姓名',
            ]);
//提示错误信息的定制

】

错误信息提示到缓存中，然后传递到validator页面=》由create页面调用；

1-2-3数据保持{{old('Student.name')}}

1-3 修改模型变动性别

修改模型

const SEX_UN = 10;
    const SEX_BOY = 20;
    const SEX_GRIL = 30;
  public function sex($ind = null){
        $arr = [
          self::SEX_UN =>'未知',
            self::SEX_BOY=>'男',
            self::SEX_GRIL=>'女',
        ];
        if($ind !== null){
            return array_key_exists($ind, $arr)?$arr[$ind]:$arr[self::SEX_UN];
        }
        return $arr;
    }

变动控制器==》student

return view('student.create', [
            'student'=>$student
        ]);

页面改动

 @foreach($student->sex() as $ind=>$val)
                        <label class="radio-inline">
                            <input type="radio" name="Student[sex]" value="10">未知
                        </label>
                    @endforeach