zend_db and join - php

Question

I am trying to understand how to use Zend_DB in my program but I have some problems. The class below (DatabaseService) works when I pass it a simple query. However, if I pass it a query with a join clause my page just hangs and no error is returned. I cut and paste the qry in a query browser and it is valid
Any help would be great
$SQL = "select name from mytable"
$db = new DatabaseService($dbinfo)
$db ->fetchall($SQL ) // works
-----------------------------------------------------------
$SQL = "select count(*) as cnt from EndPoints join CallID on EndPoints.`CallID` = CallID.CallID where EndPoints.LastRegister >= '2010-04-21 00:00:01' and EndPoints.LastRegister <= '2010-04-21 23:59:59' "
$db = new DatabaseService($dbinfo)
$db ->fetchall($SQL ) // DOES NO WORK
class DatabaseService
{
function DatabaseService($dbinfo,$dbname="")
{
try
{
$dbConfig = array(
'host' => $this->host,
'username' => $this->username,
'password' => $password,
'dbname' => $this->dbname );
$this->db = Zend_Db::factory($this->adapter, $dbConfig);
Zend_Db_Table::setDefaultAdapter($this->db);
}
catch(Zend_Exception $e)
{
$this->error = $e->getMessage();
Helper::log($this->error);
return false;
}
}
public function connnect()
{
if($this->db !=null)
{
try
{
$this->db->getConnection();
return true;
}
catch (Zend_Exception $e)
{
$err = "FAILED ::".$e->getMessage()." <br />";
}
}
return false;
}
public function fetchall($sql)
{
$res= $this->db->fetchAll($sql);
return $res;
}
}

Answer 1

I can't see why that wouldn't work. It could be a bug in a particular release of ZF but as far as I can tell there are no SQL syntax errors. What you could do is Bootstrap the Zend_Db class somewhere in your system like in the index.php file just as you were doing in your DatabaseService class:
$dbConfig = array(
'host' => 'hostname',
'username' => 'username',
'password' => 'password',
'dbname' => 'dbname'
);
$db = Zend_Db::factory('mysqli', $dbConfig);
$db->setFetchMode(Zend_Db::FETCH_OBJ);
Zend_Db_Table::setDefaultAdapter($db);
And then Zend Framework should handle the connection process for you. Then instead of having a DatabaseService class you just create a model for each table you need like so:
<?php
class EndPoints extends Zend_Db_Table_Abstract
{
protected $_name = 'EndPoints';
/**
* the default is 'id'. So if your table's primary key field name is 'id' you
* will not be required to set this. If your primary key is something like
* 'EndPointsID' you MUST set this.
* #var primary key field name
*/
protected $_primary = 'EndPointsID';
}
Doing this will automagically give you access to functions such as fetchRow(), fetchAll(), find(), etc. Then you can also use Zend_Db_Table_Select for your queries which can be quite useful. Like so:
<?php
$endPointsModel = new EndPoints();
$callIdCount = $endPointsModel->getCallIdCount('2010-04-21 00:00:01', '2010-04-21 00:00:01');
Then in your EndPoints model you would create that function like so:
...
public function getCallIdCount($fromDate, $toDate)
{
$cols = array('cnt' => 'count(*)');
$select = $this->select->setIntegrityCheck(false) // this is crucial
->from($this->_name, $cols)
->join('CallID', "{$this->_name}.CallID = CallID.CallID", array())
->where("{$this->_name}.LastRegister >= ?", $fromDate)
->where("{$this->_name}.LastRegister <= ?", $toDate);
// if you need to see what the whole query will look like you can do this:
// echo $select->__toString();
return $this->fetchAll($select);
{