Fixed and used the batch related endpoint for entities relations

Author: Leonardo Pedretti

src/Endpoints/BatchRelatedEndpoint.php

@@ -25,7 +25,9 @@ private function listGenerator($relations)
     {
         return (function ($relations) {
             foreach ($relations as $owner => $related) {
-                yield "$owner/related" => ['json' => ['resource' => (array)$related]];
+				foreach ($related as $r) {
+					yield "$owner/related" => ['json' => ['resource' => [ 'id' => $r['id'], 'type' => $r['type']]]];
+				}
             }
         })($relations);
     }

src/Endpoints/Endpoint.php

@@ -77,16 +77,16 @@ public function createMany($entries)
 
 		$results = $this->request('post', $this->entriesJsonifier($entriesGenerator($entries)));
 
+		$pwlinkedRelations = [];
+		
 		foreach ($results as $result) {
 			if (!empty($relations[$result->custom_fields['TM2 ID']->getValue()])) {
-				foreach ($relations[$result->custom_fields['TM2 ID']->getValue()] as $relation) {
-					if (!empty($relation['id'])) {
-						$this->related($result->id)->create($relation['id'], $relation['type']);
-					}
-				}
+				$pwlinkedRelations[$result->id] = & $relations[$result->custom_fields['TM2 ID']->getValue()];
 			}
 		}
 
+		$this->relatedBatch()->create($pwlinkedRelations);
+		
         return $results;
     }