TYPO3 Core

An Example from ext_tables.php where the Extension itselfe works but disturbs other Extensions (don't know why):

$tempColumns = Array (
'select_key' => Array( // tx_mdbfeedit_pi1_datasource
'label' => 'Datenquelle',
'config' => array(
'type' => 'select',
'items' => array(
array('Auswahl-Menue','modeSelector'),
array('Datenbank-Tabelle','table'),
array('FlexForm','flexForm'),
),
)
),
'pi_flexform' => Array (
'config' => array(
'type' => 'flex',
'ds_pointerField' => 'list_type,select_key', //tx_mdbfeedit_pi1_datasource',
'ds' => array(
#'mdb_feedit_pi1,default' => 'FILE:EXT:mdb_feedit/pi1/flexform_ttcontent_ds_table.xml',
'mdb_feedit_pi1,modeSelector' => 'FILE:EXT:mdb_feedit/pi1/flexform_ttcontent_ds_modeSelector.xml',
'mdb_feedit_pi1,table' => 'FILE:EXT:mdb_feedit/pi1/flexform_ttcontent_ds_table.xml',
'mdb_feedit_pi1,flexForm' => 'FILE:EXT:mdb_feedit/pi1/flexform_ttcontent_ds_ff.xml',
),
),
),
);

Here the challenge is to get the second parameter from $tempColumns['select_key']['config']['items'][ x ] connected with the $srcPointer of my first post.
Actually I don't know from where to get it because I defined several files in an array, so there has to be the current one somewhere in a global array. In most cases the second parameter is 'list' but as you see, not in my case.

Even if it's not the best way, I post the changed and tested code instead of a diff-file. I rearranged the inquiries because else the inquiries with "*" are omited. I tested only with two strings and never with "*" or one string for $pointerFields:

public static function getFlexFormDS($conf, $row, $table, $fieldName = '', $WSOL = TRUE, $newRecordPidValue = 0) {
        global $TYPO3_CONF_VARS;

// Get pointer field etc from TCA-config:
        $ds_pointerField =     $conf['ds_pointerField'];
        $ds_array =         $conf['ds'];
        $ds_tableField =     $conf['ds_tableField'];
        $ds_searchParentField =     $conf['ds_pointerField_searchParent'];

// Find source value:
        $dataStructArray = '';
        if (is_array($ds_array))    {    // If there is a data source array, that takes precedence
                // If a pointer field is set, take the value from that field in the $row array and use as key.
            if ($ds_pointerField)    {

// Up to two pointer fields can be specified in a comma separated list.
                $pointerFields = t3lib_div::trimExplode(',', $ds_pointerField);
                    // If we have two pointer fields, the array keys should contain both field values separated by comma. The asterisk "*" catches all values.
                    // For backwards compatibility, it's also possible to specify only the value of the first defined ds_pointerField.
                if(count($pointerFields)  2) {
                        // Check if we have a DS for the value of the first pointer field suffixed with ",*" 
                    if($ds_pointerField  $pointerFields[0].',*') {
                        $srcPointer = $row[$pointerFields[0]].',*';
                    }
                        // Check if we have a DS for the value of the second pointer field prefixed with "*," 
                    elseif($ds_pointerField == '*,'.$pointerFields[1]) {
                        $srcPointer = '*';
                        if ($pointerFields[1]) $srcPointer .= ','.$row[$pointerFields[1]];
                        else $srcPointer .= ',list';
                    }
                        // Check if we have a DS for the combination of both pointer fields values
                    elseif($ds_pointerField == $pointerFields[0].','.$pointerFields[1]) {
                        $srcPointer = $row[$pointerFields[0]];
                        if ($row[$pointerFields[1]]) $srcPointer .= ','.$row[$pointerFields[1]];
                        else $srcPointer .= ',list';
                    }
                        // Check if we have a DS for just the value of the first pointer field (mainly for backwards compatibility)
                    elseif($pointerFields[0]) {
                        $srcPointer = $row[$pointerFields[0]];
                    }
                } else {
                    $srcPointer = $row[$pointerFields[0]];
                }
                $srcPointer = isset($ds_array[$srcPointer]) ? $srcPointer : 'default';
            } else $srcPointer = 'default';

[....]

One open point:

when a plugin in BE was called where some code was inserted in a pointerfield (i.e. select_key) then this code is not deleted when the plugin is changed. This causes failure of getting the correct DS of the new plugin.
In the moment I have no idea how to fix it.

provided patch bug_13176_v1.diff

My Description in this Form isn't correct.

I had scenarios where my patch didn't work.

I'll post another patch with a better description...