Has anyone made datatables in Yii using server-side processing?

Question

Yii

I've been hitting the wall for a week, I just can't do server-side processing on datatables in Yii.
Here is the jQuery:

$(document).ready(function() {
        $('#drugs').DataTable({
            serverSide: true,
            ajax: {
                url: '/products/retrievedata',
                type: 'POST'
            }
        });
    } );

Here is Yii:

$Tablename = 'mst_nomenclature';
        $aColumns = array( 'id', 'code',  'name', 'manufacturer_id',  'origin_country_id', 'idn');

        /* Indexed column (used for fast and accurate table cardinality) */
        $sIndexColumn = "id";

        /* DB table to use */
        $sTable = $Tablename;

        /*
         * Paging
         */
        $sLimit = "";
        if ( isset( $_GET['iDisplayStart'] ) && $_GET['iDisplayLength'] != '-1' )
        {
            $sLimit = "LIMIT ".mysql_real_escape_string( $_GET['iDisplayStart'] ).", ".
                mysql_real_escape_string( $_GET['iDisplayLength'] );
        }


        /*
         * Ordering
         */
        $sOrder = "";
        if ( isset( $_GET['iSortCol_0'] ) )
        {
            $sOrder = "ORDER BY  ";
            for ( $i=0 ; $i<intval( $_GET['iSortingCols'] ) ; $i++ )
            {
                if ( $_GET[ 'bSortable_'.intval($_GET['iSortCol_'.$i]) ] == "true" )
                {
                    $sOrder .= $aColumns[ intval( $_GET['iSortCol_'.$i] ) ]."
                                        ".mysql_real_escape_string( $_GET['sSortDir_'.$i] ) .", ";
                }
            }

            $sOrder = substr_replace( $sOrder, "", -2 );
            if ( $sOrder == "ORDER BY" )
            {
                $sOrder = "";
            }
        }


        /*
         * Filtering
         * NOTE this does not match the built-in DataTables filtering which does it
         * word by word on any field. It's possible to do here, but concerned about efficiency
         * on very large tables, and MySQL's regex functionality is very limited
         */
        $sWhere = "";
        if ( isset($_GET['sSearch']) && $_GET['sSearch'] != "" )
        {
            $sWhere = "WHERE (";
            for ( $i=0 ; $i<count($aColumns) ; $i++ )
            {
                $sWhere .= $aColumns[$i]." LIKE '%".mysql_real_escape_string( $_GET['sSearch'] )."%' OR ";
            }
            $sWhere = substr_replace( $sWhere, "", -3 );
            $sWhere .= ')';
        }

        /* Individual column filtering */
        for ( $i=1 ; $i<count($aColumns) ; $i++ )
        {
            if ( isset($_GET['bSearchable_'.$i]) && $_GET['bSearchable_'.$i] == "true" && $_GET['sSearch_'.$i] != '' )
            {
                if ( $sWhere == "" )
                {
                    $sWhere = "WHERE ";
                }
                else
                {
                    $sWhere .= " AND ";
                }
                $sWhere .= $aColumns[$i]." LIKE '%".mysql_real_escape_string($_GET['sSearch_'.$i])."%' ";
            }
        }


        /*
         * SQL queries
         * Get data to display
         */
        $sQuery = "
                SELECT SQL_CALC_FOUND_ROWS ".str_replace(" , ", " ", implode(", ", $aColumns))."
                FROM   $sTable
                $sWhere
                $sOrder
                $sLimit
        ";
        $rResult = MstNomenclature::model()->findBySql($sQuery);

        /* Data set length after filtering */
        $sQuery = "
                SELECT FOUND_ROWS()
        ";
        $rResultFilterTotal = MstNomenclature::model()->findBySql( $sQuery) or die(mysql_error());
        $aResultFilterTotal = mysql_fetch_array($rResultFilterTotal);
        $iFilteredTotal = $aResultFilterTotal[0];

        /* Total data set length */
        $sQuery = "
                SELECT COUNT(".$sIndexColumn.")
                FROM   $sTable
        ";
        $rResultTotal = MstNomenclature::model()->findBySql( $sQuery ) or die(mysql_error());
        $aResultTotal = mysql_fetch_array($rResultTotal);
        $iTotal = $aResultTotal[0];


        /*
         * Output
         */
        $output = array(
            "sEcho" => intval($_GET['sEcho']),
            "iTotalRecords" => $iTotal,
            "iTotalDisplayRecords" => $iFilteredTotal,
            "aaData" => array()
        );

        while ( $aRow = mysql_fetch_array( $rResult ) )
        {
            $row = array();
            for ( $i=0 ; $i<count($aColumns) ; $i++ )
            {
                if ( $aColumns[$i] == "version" )
                {
                    /* Special output formatting for 'version' column */
                    $row[] = ($aRow[ $aColumns[$i] ]=="0") ? '-' : $aRow[ $aColumns[$i] ];
                }
                else if ( $aColumns[$i] != ' ' )
                {
                    /* General output */
                    $row[] = $aRow[ $aColumns[$i] ];
                }
            }
            $output['aaData'][] = $row;
        }

        echo json_encode( $output );