TP5-with方法

TP5

hasMany('关联模型名','外键名','主键名',['模型别名定义']);

model 模组
<?php
namespace app\index\model;
use think\Model;

/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2020/1/2
 * Time: 22:06
 */
class Banner extends Model
{
    public function comments()
    {
        return $this->hasMany('Comment','memberid','px')->field('id,goodsid,memberid,content,add_time');
    }
}

<?php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2020/1/2
 * Time: 22:11
 */

namespace app\index\model;


use think\Model;

class Comment extends Model
{

}

控制器
<?php
namespace app\index\controller;


use app\index\model\Banner;

class Index
{
    public function index()
    {
        $article =new Banner();
        $arr = Banner::with('comments')->paginate(1);
        echo "<pre>";
        foreach($arr as $key => $value){
            print_r($value->toArray());
        }
//        return  View('index');
    }
}