sql - 如何用另一个 sql 查询编写WhereIn()

Question

我有以下 SQL 查询

... where group_id IN (select group_id from alert where monitor_id = 4);

我想用 Doctrine 写它，但我不知道如何将 IN select 添加到 WHEREIN() 子句中!有什么想法吗？

这就是我所做的

$q = $this->createQuery('u') 
    ->select('u.email_address') 
    ->distinct(true)
    // ->from('sf_guard_user u') 
    ->innerJoin('u.sfGuardUserGroup ug') 
    ->where('ug.group_id IN(select group_id from alert where monitor_id=?',$monitor);     

$q->execute(); 

在 sfGuardUserTable.class 中:

public function getMailsByMonitor($monitor) {


        $q = Doctrine_Query::create()->from("alert a")->where("a.monitor_id", $monitor);
        $groups_raw = $q->execute(array(), Doctrine_Core::HYDRATE_ARRAY);
        $groups = array();
        print_r($groups_raw);
        foreach ($groups_raw as $gr) {
            $groups[] = $gr->id; //line 33
        }


        $q2 = $this->createQuery('u')
                ->select('u.email_address')
                ->distinct(true)
                ->innerJoin('u.sfGuardUserGroup ug')
                ->whereIn("ug.group_id", $groups);
        return $q2->execute();
    }

Answer 1

通常你会这样做:

$q = Doctrine_Query::create()
  ->from('User u')
  ->whereIn('u.id', array(1, 2, 3));

但我认为这个更适合您的需求:

$q = Doctrine_Query::create()
  ->from('Foo f')
  ->where('f.group_id IN (SELECT f.group_id FROM Alert a WHERE a.monitor_id = ?)', 4);