Explicitly check null for the value

Author: mbabker

src/Revisionable/Document/Repository/RevisionRepository.php

@@ -124,15 +124,13 @@ protected function fillDocument(object $document, array $data): void
             $mapping = $documentMeta->getFieldMapping($field);
 
             // Fill the embedded document
-            if ($documentWrapper->isEmbeddedAssociation($field)) {
-                if (!empty($value)) {
-                    assert(class_exists($mapping['targetDocument']));
-
-                    $embeddedMetadata = $this->getDocumentManager()->getClassMetadata($mapping['targetDocument']);
-                    $document = $embeddedMetadata->newInstance();
-                    $this->fillDocument($document, $value);
-                    $value = $document;
-                }
+            if ($documentWrapper->isEmbeddedAssociation($field) && null !== $value) {
+                assert(class_exists($mapping['targetDocument']));
+
+                $embeddedMetadata = $this->getDocumentManager()->getClassMetadata($mapping['targetDocument']);
+                $document = $embeddedMetadata->newInstance();
+                $this->fillDocument($document, $value);
+                $value = $document;
             } elseif ($documentMeta->isSingleValuedAssociation($field)) {
                 assert(class_exists($mapping['targetDocument']));