Question

运行以下内容时，我在标题中收到错误消息：

$year = date('Y');
        $month = date('n');
        $day = date('j') - 3;
        $week = date('W') - 1;

        $select = "SELECT IF( station_name =  '',  'Unknown', station_name ) station_name, station_name as db_name, sum(case when year(print_date) = $year then print_pages end) as yearpages, sum(case when (month(print_date) = $month and year(print_date) = $year) then print_pages end) as monthpages, sum(case when (day(print_date) = $day and year(print_date) = $year and month(print_date) = $month) then print_pages end) as daypages, sum(case when (week(print_date) = $week AND year(print_date) = $year AND month(print_date) = $month) then print_pages end) as weekpages
                    FROM `file_prints`
                    GROUP BY station_name;";

        $rows = $_userTable->getAdapter()->fetchAll($select);
        foreach($rows as $key => $row)
        {
            $oModelStation = new Application_Model_PrintStation();
            $fPrintsModel = new Application_Model_FilePrints();
            $station = $oModelStation->fetchRow($oModelStation->select()->where('name = ?', $row['station_name']));
            $row['weekpages'] = $fPrintsModel->fetchRow($fPrintsModel
                ->select(array('sum(print_pages) as weekpages'))
                ->where('station_name = ?', $row['station_name']));
                ->where('year(print_date) = ?', $year)
                ->where('week(print_date) = ?', $week));

            echo $row['weekpages'];

错误追溯到最后一行是这个示例代码（echo $ row [＆＃39; weekpages＆＃39;]）。我通过初始$ select SQL查询的回声测试了结果，看起来很令人满意，我已经尝试删除fetchRow执行中的各种where条件，看看是否有一个条件是责备但我继续得到相同的错误消息。

此外，当我使用此代码执行var_dump（$ row）时，我看到，weekpages的键指向Zend对象，而daypages，monthpages和yearpages的所有其他键指向包含数值的字符串。

Answer 1

错误消息告诉您问题所在。 fetchRow（）返回一个Zend_Db_Table_Row对象，然后将其存储在索引'weekpages'中的数组中。我不确定您打算如何处理检索到的行中的数据，但您可以尝试将行对象转换为带有 - ＆gt; toArray（）的数组，或者访问行对象的各个字段，如下所示：

echo $row['weekpages']->weekpages;

假设您打算使用$ row ['weekpages']来保存行对象，尽管您选择索引的字符串会让我觉得可能不是这样。

为了进一步说明，$ row ['weekpages']的值是行对象，您在查询中使用别名的列也称为“weekpages”。

Zend_Db_Table_Row类的对象无法转换为字符串

1 个答案: