ship-expert/app/data/model/DataNotice.php

<?php

namespace app\data\model;

use think\admin\Model;
use think\db\Query;
use think\helper\Str;
/**
 * @method static|Query show()
 */
class DataNotice extends Model
{
    public function readUser(){
        return $this->belongsToMany(DataUser::class,DataNoticeRead::class,'notice_id','uuid');
    }
    public function reads(){
        return $this->hasMany(DataNoticeRead::class,'notice_id');
    }
    public static function onAfterDelete(self $model): void
    {
        $model->read()->delete();
    }
}