itemsProcFunc and selected items in TYPO3 6.2 - typo3

Question

I'm writing an extension which is configured via FlexForms. One element of the FlexForm is of type 'select', with maxitems > 1. I use itemsProcFunc to call an external class method modifying the 'items' array.
This works fine so far, but when I try to save the plugin options in BE, the entries under 'Selected:' vanish. However, the selected values are stored correctly. See below for my flexform configuration .
<settings.flexuserList>
<TCEforms>
<label>Sektionen</label>
<config>
<type>select</type>
<itemsProcFunc>tx_hevpersons_sections->dogetSectionInfo1</itemsProcFunc>
<maxitems>10000</maxitems>
<size>10</size>
</config>
</TCEforms>
</settings.flexuserList>
public function dogetSectionInfo1($params, $conf)
{
print_r($params['row']['pi_flexform']);
$flexform = \TYPO3\CMS\Core\Utility\GeneralUtility::xml2array($params['row']['pi_flexform']);
$grp = $flexform['data']['sDEF']['lDEF']['settings.flexroleList']['vDEF'];
$flexcantonval = $flexform['data']['sDEF']['lDEF']['settings.flexcanton']['vDEF'];
$flexsectionList = $flexform['data']['sDEF']['lDEF']['settings.flexsectionList']['vDEF'];
$flexuserList = $flexform['data']['sDEF']['lDEF']['settings.flexuserList']['vDEF'];
f( strstr( $grp , "|" ) ){
$string = explode(",",$grp);
foreach ($string as $key => $value) {
$array = explode('|',$value);
$nearay[$key] = $array[0];
}
}
if( count($nearay) ){
foreach ($nearay as $key => $value) {
$usergroupFind[$key] = 'FIND_IN_SET("'.$value.'",usergroup)';
}
$string = ' AND '.implode(' OR ', $usergroupFind) . ' ';
}
if( !empty($string) ){
$GLOBALS['TYPO3_DB']->store_lastBuiltQuery = 1;
$res = $GLOBALS['TYPO3_DB']->exec_SELECTquery("uid, name ", 'fe_users', 'deleted=0 AND disable=0 '.$string );
while($entry = $GLOBALS['TYPO3_DB']->sql_fetch_assoc($res))
{
$params['items'][count($params['items'])] = array(trim($entry['name'] ), $entry['uid']);
}
$GLOBALS['TYPO3_DB']->sql_free_result($res);
}
return $params;
}
When a printed flexfrom , I got 2 xml records in which one has comma seperated values stored inside the xml while the other has empty values . Can some one help me with this ?

Answer 1

I think you should return config instead of params.
One of my working example, might be your helps:
TYPO3 v7.6.2
-FlexForm settings
<settings.eventID>
<TCEforms>
<label>Available Event</label>
<config>
<type>select</type>
<size>1</size>
<minitems>0</minitems>
<maxitems>1</maxitems>
<itemsProcFunc>VENDOR\EXT\Controller\ControllerName->flexFormsEventsListItems</itemsProcFunc>
<items type="array"></items>
</config>
</TCEforms>
</settings.eventID>
-Action
public function flexFormsEventsListItems($config){
$formsRepository = $GLOBALS['TYPO3_DB']->exec_SELECTgetRows('fields',
'table_name',
'WHERE clause', '', '', '', '');
$formsData = array(
'Events' => $formsRepository,
);
// create option list
$optionList = array();
foreach($formsRepository as $key=>$item){
$label = $item['title'];
$value = $item['uid'];
$optionList[] = array(0 => $label, 1 => $value);
}
// return config
$config['items'] = array_merge($config['items'], $optionList);
return $config;
}