Bug fixed in StraightKeyParser

Author: Mateusz Gostanski

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 All notable changes to `api-client` will be documented in this file
 
+## 3.2.1 - 2021-05-04
+
+- Bug fixed in `StraightKeyParser`
+
 ## 3.2.0 - 2021-04-29
 
 - Use snake_case naming convention in results data array instead of camelCase

src/Data/StraightKeyParser.php

@@ -44,7 +44,7 @@ protected function parseElement(array $input): array
             $dtoFieldName = $field->getName();
             $arrayFieldName = Str::snake($dtoFieldName);
 
-            if ($dtoFieldName === 'relationships') {
+            if ($dtoFieldName === 'relationships' && isset($input[$arrayFieldName])) {
                 $data[$dtoFieldName] = $this->parseRelationship($input[$arrayFieldName]);
             } else {
                 $data[$dtoFieldName] = $input[$arrayFieldName] ?? null;