addAssociatedIds() created

src/ModelManager.php

@@ -322,6 +322,31 @@ class ModelManager
         return $Table->saveOrFail($Entity);
     }
 
+    public function addAssociatedIds($entityId, $field, $associatedIds)
+    {
+        $Entity = $this->find([
+            'include' => 'first', 'containAll' => true,
+        ], 'Id', $entityId);
+
+        $existingAssociatedIds = [];
+
+        foreach ($Entity->get($field) as $associatedEntity) {
+            $existingAssociatedIds[] = $associatedEntity->get('id');
+        }
+
+        $Table = TableRegistry::getTableLocator()->get($this->tableAlias);
+
+        $Entity = $Table->patchEntity($Entity, [
+
+            $field => [
+                '_ids' => array_merge($existingAssociatedIds, $associatedIds),
+            ],
+
+        ]);
+
+        return $Table->saveOrFail($Entity);
+    }
+
 
     /**
      * @param array $ids