[TYPO3-mvc] Relations to non existing Domain-Models (eg. fe_groups and sys_language)

[Benno Weinzierl]

Hey guys,

i think that Issue #3440 is not a feature as declared but it is a bug that 
should be fixed before extbase is out of alpha-state.

The reason:
I have a Model with a relation to fe_groups. There is not yet a Model for 
fe_groups but thats not the Problem.
The big problem is that this beakes my plugin with a broken sql-statement 
because of a missing classname in the TCA.

It can be easily fixed by the following code:

Index: Classes/Persistence/Mapper/DataMapper.php
===================================================================
--- Classes/Persistence/Mapper/DataMapper.php (revision 970)
+++ Classes/Persistence/Mapper/DataMapper.php (working copy)
@@ -220,7 +220,7 @@
    if ($columnMap->getTypeOfRelation() === 
Tx_Extbase_Persistence_Mapper_ColumnMap::RELATION_HAS_ONE) {
     $query = $this->queryFactory->create($columnMap->getChildClassName());
     $result = 
current($query->matching($query->withUid($row[$columnMap->getColumnName()]))->execute());
-   } elseif ($columnMap->getTypeOfRelation() === 
Tx_Extbase_Persistence_Mapper_ColumnMap::RELATION_HAS_MANY) {
+   } elseif ($columnMap->getTypeOfRelation() === 
Tx_Extbase_Persistence_Mapper_ColumnMap::RELATION_HAS_MANY && 
$columnMap->getChildClassName()) {
     $objectStorage = new Tx_Extbase_Persistence_ObjectStorage();
     $query = $this->queryFactory->create($columnMap->getChildClassName());
     $objects = 
$query->matching($query->equals($columnMap->getParentKeyFieldName(), 
$parentObject->getUid()))->execute();


Is it possible to include this? Maybe some more code is needed for the other 
relations but this fixes my broken relation to fe_groups.

Benno