Fixed phpunit tests for postgres

src/Controller/ProjectController.php

@@ -207,6 +207,11 @@ public function addPart(Request $request, EntityManagerInterface $entityManager,
  //Preset the BOM entries with the selected parts, when the form was not submitted yet
  $preset_data = new ArrayCollection();
  foreach (explode(',', (string) $request->get('parts', '')) as $part_id) {
+ //Skip empty part IDs. Postgres seems to be especially sensitive to empty strings, as it does not allow them in integer columns
+ if ($part_id === '') {
+ continue;
+ }
+
  $part = $entityManager->getRepository(Part::class)->find($part_id);
  if (null !== $part) {
  //If there is already a BOM entry for this part, we use this one (we edit it then)

src/Repository/DBElementRepository.php

@@ -79,7 +79,7 @@ public function changeID(AbstractDBElement $element, int $new_id): void
 
  /**
  * Find all elements that match a list of IDs.
- *
+ * They are ordered by IDs in an ascending order.
  * @return AbstractDBElement[]
  * @phpstan-return list<TEntityClass>
  */
@@ -89,6 +89,7 @@ public function getElementsFromIDArray(array $ids): array
  $q = $qb->select('element')
  ->where('element.id IN (?1)')
  ->setParameter(1, $ids)
+ ->orderBy('element.id', 'ASC')
  ->getQuery();
 
  return $q->getResult();