упустил момент есть еще файл который читает из бд называется read.php
<?php

try {
// initialize application
include 'init.php';

// decode request object
$request = json_decode($_GET['q'], true);

$response = array(
'success' => false,
'requestId' => $request['requestId']
);

// get request parameters for the stores
$storeParams = array();
foreach ($request['stores'] as $store) {
if (is_array($store)) {
// keep request params for the store
$storeParams[$store['storeId']] = $store;
} else {
$storeParams[$store] = $store;
}
}

// if calendar manager was requested for loading
if (isset($storeParams['calendars'])) {
// get rows
$calendars = &$app->getCalendars();
$response['calendars'] = array(
'rows' => $calendars,
// we return project calendar identifier in the metaData section for the store
'metaData' => array(
'projectCalendar' => $app->getProjectCalendarId()
)
);
}
// if resource store was requested for loading
if (isset($storeParams['resources'])) {
$response['resources'] = array(
// get rows
'rows' => $app->getResources(),
// get total number of found resources
'total' => $app->getFoundRows()
);
}
// if assignment store was requested for loading
if (isset($storeParams['assignments'])) {
$response['assignments'] = array(
// get rows
'rows' => $app->getAssignments(),
// get total number of found assignments
'total' => $app->getFoundRows()
);
}
// if dependency store was requested for loading
if (isset($storeParams['dependencies'])) {
$response['dependencies'] = array(
// get rows
'rows' => $app->getDependencies(),
// get total number of found dependencies
'total' => $app->getFoundRows()
);
}
// if task store was requested for loading
if (isset($storeParams['tasks'])) {
$response['tasks'] = array(
// get rows
'rows' => $app->getTasks()
);
}

$response['success'] = true;
// return server revision mark
$response['revision'] = $app->getRevision();
die(json_encode($response));

// handle exceptions gracefully
} catch (Exception $e) {
$response['success'] = false;
$response['message'] = $e->getMessage();
$response['code'] = $e->getCode();
die(json_encode($response));
}

кажется нашел где происходит подключение
<sup><?php
namespace Bryntum\Gantt;

use Exception;
use PDO;

define(__NAMESPACE__.'\E_APP_UPDATE_TASK', 100);
define(__NAMESPACE__.'\E_APP_ADD_TASK', 101);
define(__NAMESPACE__.'\E_APP_REMOVE_TASK', 102);
define(__NAMESPACE__.'\E_APP_GET_TASKS', 104);
define(__NAMESPACE__.'\E_APP_TASK_NOT_FOUND', 105);
define(__NAMESPACE__.'\E_APP_GET_CALENDAR_DAYS', 110);
define(__NAMESPACE__.'\E_APP_UPDATE_CALENDAR_DAY', 111);
define(__NAMESPACE__.'\E_APP_ADD_CALENDAR_DAY', 112);
define(__NAMESPACE__.'\E_APP_REMOVE_CALENDAR_DAY', 113);
define(__NAMESPACE__.'\E_APP_CALENDAR_DAY_NOT_FOUND', 114);
define(__NAMESPACE__.'\E_APP_GET_CALENDARS', 120);
define(__NAMESPACE__.'\E_APP_UPDATE_CALENDAR', 121);
define(__NAMESPACE__.'\E_APP_ADD_CALENDAR', 122);
define(__NAMESPACE__.'\E_APP_REMOVE_CALENDAR', 123);
define(__NAMESPACE__.'\E_APP_CALENDAR_NOT_FOUND', 124);
define(__NAMESPACE__.'\E_APP_CALENDAR_HAS_CALENDARS', 125);
define(__NAMESPACE__.'\E_APP_CALENDAR_USED_BY_RESOURCE', 126);
define(__NAMESPACE__.'\E_APP_CALENDAR_USED_BY_TASK', 127);
define(__NAMESPACE__.'\E_APP_UPDATE_RESOURCE', 130);
define(__NAMESPACE__.'\E_APP_ADD_RESOURCE', 131);
define(__NAMESPACE__.'\E_APP_REMOVE_RESOURCE', 132);
define(__NAMESPACE__.'\E_APP_GET_RESOURCES', 133);
define(__NAMESPACE__.'\E_APP_RESOURCE_NOT_FOUND', 134);
define(__NAMESPACE__.'\E_APP_REMOVE_USED_RESOURCE', 135);
define(__NAMESPACE__.'\E_APP_UPDATE_ASSIGNMENT', 140);
define(__NAMESPACE__.'\E_APP_ADD_ASSIGNMENT', 141);
define(__NAMESPACE__.'\E_APP_REMOVE_ASSIGNMENT', 142);
define(__NAMESPACE__.'\E_APP_GET_ASSIGNMENTS', 143);
define(__NAMESPACE__.'\E_APP_ASSIGNMENT_NOT_FOUND', 144);
define(__NAMESPACE__.'\E_APP_UPDATE_DEPENDENCY', 150);
define(__NAMESPACE__.'\E_APP_ADD_DEPENDENCY', 151);
define(__NAMESPACE__.'\E_APP_REMOVE_DEPENDENCY', 152);
define(__NAMESPACE__.'\E_APP_GET_DEPENDENCIES', 153);
define(__NAMESPACE__.'\E_APP_DEPENDENCY_NOT_FOUND', 154);
define(__NAMESPACE__.'\E_APP_UPDATE_TASK_SEGMENT', 155);
define(__NAMESPACE__.'\E_APP_ADD_TASK_SEGMENT', 156);
define(__NAMESPACE__.'\E_APP_REMOVE_TASK_SEGMENTS', 157);
define(__NAMESPACE__.'\E_APP_GET_TASK_SEGMENTS', 158);
define(__NAMESPACE__.'\E_APP_TASK_SEGMENT_NOT_FOUND', 159);

class Gantt extends \Bryntum\CRUD\BaseDAO
{

public function __construct($dsn, $dbuser, $dbpwd)
{
// call parent
parent::__construct($dsn, $dbuser, $dbpwd);

$this->initRowsHolders();
}

/**
* Initializes structures to keep mapping between phantom and real Ids
* and lists of implicitly updated and removed records dictionaries.
*/
public function initRowsHolders()
{
$this->phantomIdMap = array(
'tasks' => array(),
'calendars' => array(),
'resources' => array(),
'segments' => array()
);

$this->updatedRows = array(
'tasks' => array(),
'calendars' => array(),
'resources' => array()
);
и так далее...</sup>

разобрался спасибо!!!!!!!!!
надо было в файле config.php
написать вместо:
define('DSN', 'mysql:dbname=bryntum_gantt;host=localhost');
это
define('DSN', 'mysql:dbname=bryntum_gantt;charset=UTF8;host=localhost');