Merge pull request #2020 from tjgudeman/bugfix/remove-hardcoded-parent-in-get-next-and-previous-sibling-query-builder

[Tree] Removed instances of hard coded parent column in queries to get next …

Author: AkenRoberts

lib/Gedmo/Tree/Entity/Repository/NestedTreeRepository.php

@@ -426,7 +426,7 @@ public function getNextSiblingsQueryBuilder($node, $includeSelf = false)
             $qb->setParameter('pid', $wrappedParent->getIdentifier());
         } else if (isset($config['root']) && !$parent) {
             $qb->andWhere($qb->expr()->eq('node.'.$config['root'], ':root'));
-            $qb->andWhere($qb->expr()->isNull('node.parent'));
+            $qb->andWhere($qb->expr()->isNull('node.'.$config['parent']));
             $method = $config['rootIdentifierMethod'];
             $qb->setParameter('root', $node->$method());
         } else {
@@ -503,7 +503,7 @@ public function getPrevSiblingsQueryBuilder($node, $includeSelf = false)
             $qb->setParameter('pid', $wrappedParent->getIdentifier());
         } else if (isset($config['root']) && !$parent) {
             $qb->andWhere($qb->expr()->eq('node.'.$config['root'], ':root'));
-            $qb->andWhere($qb->expr()->isNull('node.parent'));
+            $qb->andWhere($qb->expr()->isNull('node.'.$config['parent']));
             $method = $config['rootIdentifierMethod'];
             $qb->setParameter('root', $node->$method());
         } else {