Laravel数据库操作之-DB facade

数据库操作之-DB facade

1. 新建数据表与连接数据库
2. 使用DB facade实现CURD

创建数据表

DROP TABLE IF EXISTS `student`;
CREATE TABLE `student` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(255) NOT NULL COMMENT '姓名',
  `age` tinyint(3) unsigned NOT NULL DEFAULT '0' COMMENT '年龄',
  `sex` tinyint(3) unsigned NOT NULL DEFAULT '10' COMMENT '性别',
  `created_at` int(11) NOT NULL DEFAULT '0' COMMENT '新增时间',
  `update_at` int(11) NOT NULL DEFAULT '0' COMMENT '修改时间',
  PRIMARY KEY (`id`)
) ENGINE=MyISAM AUTO_INCREMENT=1001 DEFAULT CHARSET=utf8;

连接数据库

数据库配置文件路径laravel\config\database.php

    //默认选择数据库
    'default' => env('DB_CONNECTION', 'mysql'),
    
    
    'mysql' => [
            'driver'    => 'mysql',
            'host'      => env('DB_HOST', 'localhost'),
            'database'  => env('DB_DATABASE', 'forge'),
            'username'  => env('DB_USERNAME', 'forge'),
            'password'  => env('DB_PASSWORD', ''),
            'charset'   => 'utf8',
            'collation' => 'utf8_unicode_ci',
            'prefix'    => '',
            'strict'    => false,
            'engine'    => null,
        ],

更改数据库配置文件

env对应文件路径laravel\ .env

DB_HOST=localhost
DB_DATABASE=laravel
DB_USERNAME=root
DB_PASSWORD=root

2. 使用DB facade实现CURD

• 新建StudentController.php控制器，代码如下

文件所在位置laravel\app\Http\Controllers\StudentController.php

<?php 
namespace App\Http\Controllers;

use Illuminate\Support\Facades\DB;

class StudentController extends Controller
{
    
    public function test1()
    {
        $students = DB::select('select * from student');
        var_dump($students);
    }
}

配置路由，代码如下

文件所在位置laravel\app\Http\routes.php

Route::get('test1',['uses'=>'StudentController@test1']);

浏览器地址栏 http://localhost:8090/laravel/public/test1

页面输出：array(0) { }

说明数据库连接成功。