Zend Framework 2:子查询

Question

ZF2最近更新到2.1.4版,数据库API已更改http://framework.zend.com/security/advisory/ZF2013-03

现在我用于子查询的代码是一个例外:

$sub = new Select('md_type');
$sub->columns(array(new Expression('COUNT(mt2.parent_id) as total')))
    ->where(array(
        new \Zend\Db\Sql\Predicate\Expression('mt2.parent_id = mt1.id')
    ))
;

$subquery = new \Zend\Db\Sql\Expression("({$sub->getSqlString()})");

$select = new \Zend\Db\Sql\Select('mt1');
$select->columns(array('*', 'cnt' => $subquery));

$ sub-> getSqlString()------>注意:在没有扩展/驱动程序支持的情况下尝试在Zend\Db\Adapter\Platform\Mysql中引用值可能会在生产环境中引入安全漏洞.

我找不到使用子查询的替代方法.请告诉我如何使用,现在如何使用子查询.谢谢!

---

这是错误:https://github.com/zendframework/zf2/pull/4068

在不久的将来,我认为这是固定的.

Answer 1

请试试这个.

$sql = new Sql($this->_adapter);
$mainSelect = $sql->select()->from('mt1');
$subQry = $sql->select()
        ->from('md_type')
        ->columns(array('orderCount' => new \Zend\Db\Sql\Expression('COUNT(md_type.parent_id)')))
        ->where('mt2.parent_id = mt1.id');
$mainSelect->columns(
        array(
            'id', 
            'total' => new \Zend\Db\Sql\Expression('?', array($subQry)),
        )
);

$statement = $sql->prepareStatementForSqlObject($mainSelect);
$comments = $statement->execute();
$resultSet = new ResultSet();
$resultSet->initialize($comments);

return $resultSet->toArray();

参考:ZF2 - 子查询