YII PHP 嵌套了每个错误

我这里有一些错误我想使用嵌套foreach合并来自 2 个查询的数据，并将数据保存在名为 result 的数组中，但这些代码部分Trying to get property of non-object错误：'id_product'=>$detail_result->ID ，谁能帮我？

我还是新手使用Yii框架PHP

这是我的代码

$result = 数组((;

        $criteria = new CDbCriteria;
        $criteria->condition = 'date_time >= :start and date_time <= :end';
        $criteria->order = 'date_time';
        $criteria->params = array(':start' => $_POST['tanggal']['start'] ,':end' => $_POST['tanggal']['end']);
        $checkIn = CheckIn::model()->findAll($criteria);
        foreach($checkIn as $entry) {
            $sql = "select * from check_in_detail where ID_check_in = $entry->ID";
            $detail_results = Yii::app()->db->createCommand($sql)->queryAll();
            foreach($detail_results as $detail_result)
            {
                 $result [] = array(
                     'tanggal'=>$entry->date_time,
                    'id_product'=>$detail_result->ID,
                     'total'=>$detail_result->total,
                     'id_distributor'=>$entry->iDDistributor->name,
                     'other'=>$entry->description,
                 );
             }
         }

有人可以帮忙吗？谢谢