Multiple Conditions with Left Join in Zend Framework

问题

I am facing an issue while working with Zend Framework. Basically I am trying to add an AND operator in a sub query using Left join. Please see the following qyery that my code is producing,

SELECT d.*, count(status) FROM deal AS d LEFT JOIN payments ON payments.deal_id = d.deal_id GROUP BY d.deal_id ORDER BY created_date desc

Code is:

    $select = $this->_db->select()
      ->from(array('d'=>'deal'))                       
      ->joinLeftUsing('payments', 'deal_id', array('count(status)'))
      ->order("created_date $sortOrder")
       ->group("d.deal_id");

However, I want to add one more condition in my sub query i.e. Status = 1, please see the following output that I am willing to get.

SELECT d.*, count(status) FROM deal AS d LEFT JOIN payments ON payments.deal_id = d.deal_id AND status = 1 GROUP BY d.deal_id ORDER BY created_date desc

Let me know if someone have an idea about how I can achieve the same.

Thanks, Gagz

回答1:

I would recommend using joinLeft instead of joinLeftUsing

$select = $this->_db->select()
      ->from(array('d'=>'deal'))                       
      ->joinLeft('payments', 'payments.deal_id = d.deal_id and status = 1', 
                 array('count(status)'))
      ->order("created_date $sortOrder")
      ->group("d.deal_id");

gives me

SELECT `d`.*, count(status) FROM `deal` AS `d`
LEFT JOIN `payments` ON payments.deal_id = d.deal_id and status = 1 
GROUP BY `d`.`deal_id` ORDER BY `created_date ` ASC

回答2:

We can use expression in Zend 3:

$join = new \Zend\Db\Sql\Expression('contractor_jobs.contractor_id = contractor_info.contractor_id AND 
                            contractor_jobs.job_trade_id = '.$variableName.' ');

    $select->join(
        'contractor_jobs',
        $join,
        array('job_trade_id'),
        $select::JOIN_LEFT
    );

It works for me. You can also check as per your conditions. Thanks for asking this question.

来源：https://stackoverflow.com/questions/8562207/multiple-conditions-with-left-join-in-zend-framework

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