Codeigniter错误:致命错误:不能将CI_DB_mysql_result类型的对象用作数组

问题描述：

我正在尝试为树实现php codeigniter模型，并且每次运行控制器时，都会出现以下错误:

I'm trying to implement a php codeigniter model for tree and every time I run my controller, I am getting the following error :

致命错误:无法将CI_DB_mysql_result类型的对象用作数组第50行的C:\ AppServ \ www \ tree \ application \ models \ Btree.php

Fatal error: Cannot use object of type CI_DB_mysql_result as array in C:\AppServ\www\tree\application\models\Btree.php on line 50

我试图在行中修复此语法

I tried to fix this syntax in line

$currentID = $row['id'];

但是，仍然收到相同的错误消息.

however, still getting the same error message.

我的模型函数是:

public function fetchTree($parentArray, $parentID = null)
{
    // Create the query
    if ($parentID == null)
        $parentID = -1;

    $sql = "SELECT `id` FROM `{$this->tblName}` WHERE `id`= ". intval($parentID);

    // Execute the query and go through the results.
    $result = $this->db->query($sql);
    if ($result)
    {
        while ($row = $result)
        {
            // Create a child array for the current ID
            $currentID = $row['id'];
            $parentArray[$currentID] = array();

            // Print all children of the current ID
            $this->fetchTree($parentArray[$currentID], $currentID);
        }
        $result->close();
    }
}

答

您的问题在于以下行:

while($row = $result)

您要将 $ row 设置为整个查询对象.您想遍历查询的结果.

You're setting $row to the entire query object. You want to loop through the results of the query.

尝试以下方法:

$query = $this->db->query($sql);
foreach($query->result_array() AS $row) {
    $currentID = $row['id'];
    ...

Codeigniter错误:致命错误:不能将CI_DB_mysql_result类型的对象用作数组

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