mysql queries does not work in zend framework - php

Question

class Application_Model_DbTable_Email extends Zend_Db_Table_Abstract
{
protected $_name = 'memberdetail';
function getUserid($email)
{
$subquery = $this->select()
->from('memberdetail', array('memberid'))
->where('email = ?', $email);
$select = $this->select()
->from('usertable', array('userid'))
->join('memberdetail', 'usertable.userid = memberdetail.memberid')
->where('usertable.userid = ?', $subquery);
$row = $select->query()->fetch();
if (!$row) {
echo "User id not found";
} else {
return $userid = $row['userid'];
}
}
}
Hi, I am trying to return the userid from the above queries. However, the queries does not seemed to be executed as I always get refreshed whenever I call this function.
P.S this set of queries were given to me by another member.

Answer 1

it looks like this is being over thought. According to the info provided usertable.userid = memberdetail.memberid with this being the case your function is simple.
/** this function assumes one and only one email will match a memberid
* this function can be improved by validating $email as existing in DB
* prior to querying DB, should be done at form level but could be accomplished here
* with Zend_Validate_Db_RecordExists()
*/
public function getUserIdFromEmail($email) {
$select = $this->select();
$select->where('email = ?',$email);
$row = $this->fetchRow($select);//fetch a single row
if (!is_null($row) {//fetchRow returns null if no row matched
return $row->memeberid;//return memberid as string/integer = usertable.userid
} else {
//handle error
}
}

Answer 2

It would have been useful to tell people you are using Zend framework.
You need to establish a connection to the database for $this as described in steps 1 and 2 in this link:
http://framework.zend.com/manual/en/zend.db.select.html/

Answer 3

You can try this, if it helps:
function getUserid($email){
$select = $this->select()
->setIntegrityCheck(false)
->from(array('m' => 'memberdetail'), array('b.userid'))
->join(array('b' => 'usertable'), 'b.userid = m.memberid')
->where('m.email = ?', $email);
$row = $this->getAdapter()->fetchAll($select);
if (!$row) {
throw new Exception("User id not found");
} else {
return $row->toArray();
}
}