yii简单增删改查操作

//①连接数据库连接
//②创建model层

<?php
namespace app\models;
use yii\db\ActiveRecord;

class Motto extends ActiveRecord{

}
?>

<?php
/**
* Created by PhpStorm.
* User: crazy stone
* Date: 2017/2/8
* Time: 16:07
*/

namespace frontend\controllers;  //命名空间

use Yii;        //使用yii核心类库
use yii\web\Controller;   ///使用yii核心类库里的 controller
use app\models\Motto;

class HelloController extends Controller{

//查看
public function actionList(){
$sql='select m_id,m_name from motto ';
$data=Motto::findBySql($sql)->asArray()->all();
//        print_r($data);die;
return $this->renderPartial('list',$data);//赋值给页面
}
//删除
public function actionDel(){
//方法1
$res=Motto::find()->where(['m_id'=>5])->all();
$res[0]->delete();
//方法2
Motto::deleteAll('m_id>3');
}

//添加
public function actionAdd(){
$motto=new Motto;
$motto->m_name='啊啊啊';
$motto->type_id=16;
$motto->l_id=1;
$motto->m_add_time=time();
$motto->hitts=2;
$motto->author=2;
$motto->save();
}
//修改
public function actionSave(){
$res=Motto::find()->where(['m_id'=>3])->one();
$res->m_name='石文远';
$res->save();
}
}