screen/application/common/model/Ad.php

<?php

namespace app\common\model;

use app\admin\model\Admin;
use think\Model;

/**
 */
class Ad extends Model
{
    // 表名
    protected $table = 'ad';

    // 自动写入时间戳字段
    protected $autoWriteTimestamp = true;

    // 定义时间戳字段名
    protected $createTime = 'created_at';
    protected $updateTime = 'updated_at';
    protected $deleteTime = false;

    // 追加属性
    protected $append = [

    ];
    public static $pos=[
        'index'=>[
            'name'=>'首页轮播',
            'pos'=>'index_top',
        ],
        'index_middle'=>[
            'name'=>'首页中间位置',
            'pos'=>'index_middle',
        ],
    ];
    protected $readonly=[];
    

    public static function getAd($pos=null){
        $q=self::order('sort','desc');
        if($pos){
            $q->where('pos',$pos);
        }
        return $q->select();
    }

    protected static function init()
    {
        self::beforeInsert(function (self $ad){
            $ad['admin_id']=$_SERVER['admin']['id'];
        });
    }

    /**
     * @return string[]
     */
    public static function getPos(): array
    {
        return self::$pos;
    }
}