模型中
 public function neicun(){

    return $this->hasMany(Neicun::class, 'shebei_id');
      }
控制器中
$this->neicun->first()?->daxiao



// 获取所有关联记录的daxiao属性数组
$daxiaoList = $this->neicun->pluck('daxiao')->toArray();

/ 获取第一个关联记录的daxiao
$firstDaxiao = $this->neicun->first()->daxiao;
// 建议加上判断避免空错误
$firstDaxiao = $this->neicun->first()?->daxiao;