php - SQLSTATE[42000] : Syntax error or access violation: 1065 Query was empty (SQL: )

Question

我有如下 PHP 类:

class SearchAttributeDao extends BaseDao
{
    private $SELECT_CATEGORY_FILTER_BY_IDS;

    function __construct()
    {
        $this->table_name = 'categoryattributes';
        $this->SELECT_CATEGORY_ATTR_BY_IDS = "SELECT csa.attributeid, atn.name FROM "
            .$this->table_name.
            " csa join attributenames atn on csa.attributeid = atn.attributeid where csa.categoryid in (?); ";
    }

    public function getListByCatIds(array $catIds)
    {
        //...
        $attr_list = $this->executeSelectQuery($this->SELECT_CATEGORY_FILTER_BY_IDS, [$catIds]); //Error on this line
        //...
    }
}

因此，当我执行应用程序时，我收到一条错误消息:

SQLSTATE[42000]: Syntax error or access violation: 1065 Query was empty (SQL: ) ... at BaseDao->executeSelectQuery(null, array(array('10523', '10524', '10606', '10423', '10533', '10618'))) in SearchAttributeDao.php line 24

上面的堆栈跟踪表明 SELECT_CATEGORY_FILTER_BY_IDS 为 null 或为空，但我已在构造函数中设置它。我做错了什么？

Answer 1

您调用的电话:

$this->executeSelectQuery($this->SELECT_CATEGORY_FILTER_BY_IDS..

但是你已经定义了:

$this->SELECT_CATEGORY_ATTR_BY_IDS = "SELECT csa.attributeid,...

尝试更正名称并重试