diff --git a/documentation/reference.md b/documentation/reference.md
index 5448db2..82d5b83 100644
--- a/documentation/reference.md
+++ b/documentation/reference.md
@@ -46,4 +46,3 @@ names. There are several drivers available:
   quick hack, but does not produce meaningful RDF.
 
 Look at the driver phpdoc for the exact syntax to use for configuration.
-
diff --git a/src/Midgard/CreatePHP/Mapper/DoctrineOrmMapper.php b/src/Midgard/CreatePHP/Mapper/DoctrineOrmMapper.php
index 7d243dc..c1f127e 100644
--- a/src/Midgard/CreatePHP/Mapper/DoctrineOrmMapper.php
+++ b/src/Midgard/CreatePHP/Mapper/DoctrineOrmMapper.php
@@ -40,46 +40,61 @@ class DoctrineOrmMapper extends BaseDoctrineRdfMapper
     /**
      * {@inheritDoc}
      *
-     * The ORM implementation for preparing the object
+     * In addition to create the object, try to find the parent relation if one exists.
      */
     public function prepareObject(TypeInterface $type, $parent = null)
     {
         $object = parent::prepareObject($type);
 
+        $config = $type->getConfig();
+        $needParent = isset($config['parent_required']) && (bool) $config['parent_required'];
+
         if (null == $parent) {
-            throw new RuntimeException('You need a parent to create new objects');
+            if ($needParent) {
+                throw new RuntimeException(sprintf('Parent is required for object of type %s', get_class($object)));
+            }
+            return $object;
         }
 
-        /** @var \Doctrine\ORM\Mapping\ClassMetadata $metaData */
+        /** @var ClassMetadata $metaData */
         $metaData = $this->om->getClassMetaData(get_class($object));
         $parentMappingField = $this->findParentMapping($parent, $metaData);
+        if (false === $parentMappingField) {
+            if ($needParent) {
+                throw new RuntimeException(sprintf('No mapping for parent class %s found in metadata of %s', ClassUtils::getClass($parent), $metaData->getName()));
+            }
+
+            return $object;
+        }
+
         $metaData->setFieldValue($object, $parentMappingField, $parent);
-        
+
         return $object;
     }
 
-
     /**
-     * find the parent object's property which holds the collection entries
+     * Find the parent object's property which holds the collection entries
+     *
+     * @param object        $parent   The parent entity.
+     * @param ClassMetadata $metaData Metadata of the object that is being created.
      *
-     * @param $parent
-     * @param ClassMetadata $metaData metadata from the collection entry's entity
-     * @param $object
-     * @return string
-     * @throws RunTimeException
+     * @return string|boolean The name of the parent mapping field or false if none is found.
      */
-    protected function findParentMapping($parent, ClassMetadata $metaData, $object = null )
+    protected function findParentMapping($parent, ClassMetadata $metaData)
     {
-        $parentClass = ClassUtils::getRealClass(get_class($parent));
+        $parentClass = ClassUtils::getClass($parent);
 
         foreach ($metaData->associationMappings as $mapping) {
-            if ($mapping['targetEntity'] == $parentClass) {
+            if ($mapping['targetEntity'] == $parentClass
+                && $metaData->isSingleValuedAssociation($mapping['fieldName'])
+            ) {
                 return $mapping['fieldName'];
             }
         }
-        throw new RuntimeException(sprintf('No mapping for parent class %s found in metadata of %s', $parentClass, $metaData->getName()));
+
+        return false;
     }
-    
+
     /**
      * {@inheritDoc}
      *