Question

我试图将这个where子句放在我的查询中用Zend 2（Zend \ Db \ Sql）：

WHERE `comunity_id` = '$communityId' 
  AND (   
   (`date_to` IS NULL AND `date_from` = CURDATE()) 
    OR 
   (`date_to` IS NOT NULL AND `date_to` >= CURDATE()) 

  )

使用此方法：

public function findByCommunityId($communityId, $limit = 10)
{
    $select = $this->getSelect();

    $where = new Where();

    $select->where(
        array(
        $where->equalTo('community_id',$communityId), PredicateSet::COMBINED_BY_AND,
        new PredicateSet(
            array(
                new IsNull('date_to'),
                $where->equalTo('date_from', new Expression('CURDATE()'))
            ), PredicateSet::COMBINED_BY_AND
        ),
        PredicateSet::COMBINED_BY_OR,               
        new PredicateSet(
            array(
                    new IsNotNull('date_to'),
                    $where->greaterThanOrEqualTo('date_to', new Expression('CURDATE()'))
            ),
            PredicateSet::COMBINED_BY_AND
        )           
        )

    );


    $select->order(array (
            'date_from' => 'ASC' 
    ));
    $select->limit($limit);

    \Zend\Debug\Debug::dump($select->getSqlString($this->getDbAdapter()->getPlatform()));die;

    return $this->select($select);
}

结果是：

SELECT `com_community_events`.* 
FROM `com_community_events` 
WHERE (`community_id` = '12' AND `date_from` = CURDATE() AND `date_to` >= CURDATE()) 
AND AND AND (`date_to` IS NULL AND (`community_id` = '12' AND `date_from` = CURDATE()     AND `date_to` >= CURDATE())) AND OR AND (`date_to` IS NOT NULL AND (`community_id` = '12' AND `date_from` = CURDATE() AND `date_to` >= CURDATE())) 
ORDER BY `date_from` ASC 
LIMIT '10'

我的问题是为什么Zend将多个AND / OR关键字放在一起，以及为什么关于community_id的第一个where子句包含在where子句的另一部分中？

Answer 1

试试这个 -

注意 - 当然我没有尝试过这个特殊的代码，但这是我通常这样做的方式。如果它不能正常工作，至少它会对nest()和unnest()的使用给出一些。

$where = new Where();
$where->nest()
    ->equalTo('community_id', $communityId)
    ->and
        ->nest()
            ->isNull('date_to')
            ->and
            ->equalTo('date_from', new Expression('CURDATE()'))
        ->unnest()
    ->or
        ->nest()
            ->isNull('date_to')
            ->and
            ->greaterThanOrEqualTo('date_from', new Expression('CURDATE()'))
        ->unnest()
    ->unnest();

祝你好运。

如何在Zend 2 Framework中创建具有多个where子句的查询？

1 个答案: