Thinkphp5学习(21)关联:一对一

学习内容:
视频教程:
https://www.kancloud.cn/tpshop/thinkphp5/228987
完全开发手册：https://www.kancloud.cn/manual/thinkphp5/142358
教程中的代码：https://github.com/phpervip/tp5a

创建一个汽车表，每个用户有一部车。

CREATE TABLE tp5.tp_car (
id INT(10) NOT NULL AUTO_INCREMENT,
user_id INT NOT NULL,
brand VARCHAR(45) NULL,
plate_number VARCHAR(45) NULL,
PRIMARY KEY (id, user_id));

model模型中

     // 定义关联方法
    public function car(){
        // 用户HAS ONE档案关联
        return $this->hasOne('Car','user_id','id');
    }

Controller控制器中

public function test19{
      $user = mUser::get(1);
        echo '车品牌:'.$user->car->brand."车牌号".$user->car->plate_number."<br/>";

        // 新增用户关联汽车
        $user =  new mUser;
        $user->email = '123@qq.com';
        $user->nickname = 'TPshop';
        $user->password = '123456';
        if($user->save()){
            $car['brand']='奔驰';
            $car['plate_number']='浙A12345';
            // uid不指定
             //$user->car()->save($car);// relation对象，添加一部车
             //return '用户['.$user->nickname.'］新增成功';
        }else{
            //return $user->getError();
        }

        // 关联查询
        // $user = mUser::get(94);
        $user = mUser::get(94,'car');
        echo $user->email.'<br/>';
        echo $user->nickname.'<br/>';
        echo $user->car->brand.'<br/>';
        echo $user->car->plate_number.'<br/>';


        // 关联更新
        $user = mUser::get(94);
        $user->email = 'Tpshop@qq.com';
        if($user->save()){
            // 更新关联数据
            $user->car->plate_number = '浙A12345';
            $user->car->save();
            return '用户['.$user->email.']更新成功';
        }else{
            return $user->getError();
        }

        // 关联删除
        $user = mUser::get(94);
        if($user->delete()){
            $user->car->delete();
            return '用户['.$user->email.']删除成功';
        }else{
            return $user->getError();
        }
}