Adapting query to JDatabase - php

Question

How can I adapt the following query to JDatabase?
SELECT
c.RAZONSOCIAL usu_razonSocial
,c.NIT usu_nit
,c.SEDE usu_sede
,c.EMAIL usu_email
,IF(IFNULL(u.block, 1) = 0, 'Activo', 'Inactivo') usu_estado
,COUNT(ct.ctf_id) nroCertificados
FROM
cargacliente c
INNER JOIN
cargas
ON (crg_id = cargas_id)
AND (crg_status = 'Ok')
INNER JOIN
certificados ct
ON (ctf_sede = SEDE)
AND (ctf_nit = NIT)
LEFT JOIN
database_1.bml_users u
ON (id = user_id)
GROUP BY
c.NIT
,c.SEDE
ORDER BY
usu_razonSocial
,usu_nit
,usu_sede;
This is Joomla 2.5.4.
I have read this post but I couldn't do it.
I tried to do it in this way:
<?php
$query
->select($db->quoteName(array('c.RAZONSOCIAL AS usu_razonSocial', 'c.NIT usu_nit', 'c.SEDE usu_sede', 'c.EMAIL usu_email', 'IF(IFNULL(u.block, 1) = 0, \'Activo\', \'Inactivo\') usu_estado', 'COUNT(ct.ctf_id) nroCertificados')))
->from($db->quoteName('database_2.cargacliente', 'c'))
->join('INNER', $db->quoteName('database_2.cargas','a') . ' ON (' . $db->quoteName('a.crg_id') . ' = ' . $db->quoteName('database_2.cargacert.cargas_id') . ') AND (' . $db->quoteName('a.crg_status') . ' = \'Ok\')')
->join('INNER', $db->quoteName('database_2.certificados','b') . ' ON (' . $db->quoteName('b.ctf_sede') . ' = ' . $db->quoteName('database_2.cargacliente.SEDE') . ') AND (' . $db->quoteName('b.ctf_nit') . ' = NIT)')
->join('LEFT', $db->quoteName('joomla_database.bml_users', 'u') . ' ON (' . $db->quoteName('database_2.usuario.usu_id') . ' = ' . $db->quoteName('joomla_database.bml_users.user_id') . ')')
->group(array('c.NIT', 'c.SEDE'))
->order(array('database_2.usuario.usu_razonSocial', 'database_2.usuario.usu_nit', 'database_2.usuario.usu_sede'));
?>
The error shown is the following:
500 - Ha ocurrido un error.
Unknown column 'c.RAZONSOCIAL usu_razonSocial' in 'field list' SQL=SELECT `c`.`RAZONSOCIAL usu_razonSocial`,`c`.`NIT usu_nit`,`c`.`SEDE usu_sede`,`c`.`EMAIL usu_email`,`IF(IFNULL(u`.`block, 1) = 0, 'Activo', 'Inactivo') usu_estado`,`COUNT(ct`.`ctf_id) nroCertificados` FROM `biochemical`.`cargacliente` AS `c` INNER JOIN `biochemical`.`cargas` AS `a` ON (`a`.`crg_id` = `biochemical`.`cargacert`.`cargas_id`) AND (`a`.`crg_status` = 'Ok') INNER JOIN `biochemical`.`certificados` AS `b` ON (`b`.`ctf_sede` = `biochemical`.`cargacliente`.`SEDE`) AND (`b`.`ctf_nit` = NIT) LEFT JOIN `biochemical_bml`.`bml_users` AS `u` ON (`biochemical`.`usuario`.`usu_id` = `biochemical_bml`.`bml_users`.`user_id`) GROUP BY c.NIT,c.SEDE ORDER BY biochemical.usuario.usu_razonSocial,biochemical.usuario.usu_nit,biochemical.usuario.usu_sede

Answer 1

The changes were the following:
Remove the first $db->quoteName() in the SELECT statement.
Modify ALIAS from tables.
LEFT JOIN modification.
The final code is the following:
$query
->select(array('c.RAZONSOCIAL AS usu_razonSocial', 'c.NIT AS usu_nit', 'c.SEDE AS usu_sede', 'c.EMAIL AS usu_email', 'IF(IFNULL(u.block, 1) = 0, \'Activo\', \'Inactivo\') AS usu_estado', 'COUNT(b.ctf_id) AS nroCertificados'))
->from($db->quoteName('database_2.cargacliente', 'c'))
->join('INNER', $db->quoteName('database_2.cargas','a') . ' ON (' . $db->quoteName('a.crg_id') . ' = ' . $db->quoteName('c.cargas_id') . ') AND (' . $db->quoteName('a.crg_status') . ' = \'Ok\')')
->join('INNER', $db->quoteName('database_2.certificados','b') . ' ON (' . $db->quoteName('b.ctf_sede') . ' = ' . $db->quoteName('c.SEDE') . ') AND (' . $db->quoteName('b.ctf_nit') . ' = c.NIT)')
->join('LEFT', $db->quoteName('joomla_database.bml_users', 'u') . ' ON (' . $db->quoteName('c.user_id') . ' = ' . $db->quoteName('u.id') . ')')
->group(array('c.NIT', 'c.SEDE'))
->order(array('usu_razonSocial', 'usu_nit', 'usu_sede'));

Answer 2

This is a bit difficult to say what the problem is without having the right environment.
I would suggest to debug through the driver to see where it fails.
You can of course also put the query direct through the "setQuery" method. It would be however compatible with MySQL only.
But, once again, please update your Joomla! to the latest version ASAP.