/**
* Transfer all back refs from given object of same class
*
* @param CMbObject &$object The object to transfer back objects from
*
* @return string|null store-like error message if failed, null if successful
*/
function transferBackRefsFrom(CMbObject &$object)
{
if (!$object->_id) {
trigger_error("transferNoId");
}
if ($object->_class !== $this->_class) {
trigger_error("An object from type '{$object->_class}' can't be merge with an object from type '{$this->_class}'", E_USER_ERROR);
}
$object->loadAllBackRefs();
foreach ($object->_back as $backName => $backObjects) {
/** @var self[] $backObjects */
if (count($backObjects)) {
$backSpec = $this->_backSpecs[$backName];
$backObject = new $backSpec->class();
$backField = $backSpec->field;
$fwdSpec = $backObject->_specs[$backField];
$backMeta = $fwdSpec->meta;
// Change back field and store back objects
foreach ($backObjects as $backObject) {
/** @var self $transferer Dummy tranferer object to prevent checks on all values */
$transferer = new $backObject->_class();
$transferer->_id = $backObject->_id;
$transferer->{$backField} = $this->_id;
$transferer->_forwardRefMerging = true;
// Cas des meta objects
if ($backMeta) {
$transferer->{$backMeta} = $this->_class;
}
if ($msg = $transferer->store()) {
return $msg;
}
}
}
}
return null;
}